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■ Pick-up cartridge for record performance O Japanese Patent Application No. 44-68757
[phase] Application No. 44 (1969) August 30 @ inventor Morita Katsuhiko Kamon Shinshi Ogata
Kamon Shin 1006 Matsushita Electric Industrial Co., Ltd. internal application use 0 applicant
Matsushita Electric Industrial Co., Ltd. Kadoma City Oji Kadoma 1006 [Phase] Agent Attorney
Yoshihiro Morimoto
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an
embodiment of the present invention, and FIG. 2 is a view as seen from the arrow A in the
assembled state of FIG. 3, FIG. 3 is a sectional view taken along the line B--B in FIG. 2, FIG. 4 is a
perspective view showing another embodiment of a terminal lug plate, and FIG. 5 is an exploded
perspective view showing another embodiment of the first invention. 6 is a view from the arrow
C in the assembled state of FIG. 5, FIG. 7 is a perspective view of the main part in FIG. 5, and FIG.
8 is a sectional view taken along the line D-D in FIG. FIG. 10 is a perspective view showing an
embodiment of the second invention, and FIGS. 11 and 12 are perspective views showing a prior
art example.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pickup cartridge
for playing a record. The conventional record playing pickup cartridge has the following
configuration. That is, as shown in FIG. 11, the lead wire 2as2b is directly soldered to the pair of
electrode flats 1at1b of the pressure sensitive element 1, and the lead wires 2a and 2b are
respectively connected to the terminals 3a and 3b. Terminal lug 4a. 4b is brought into fitting
contact with the terminals 3a, 3b to take out an electric signal, or alternatively, as shown in FIG.
12, the [111111] ends 6a, 6b of the terminals 5a, 5b made of thin metal plate. The terminal
socket 9 is made by clamping and contacting between both electrode flats 1a + 1b of the
pressure-sensitive element 1 and the damper block 7 and processing the other end into a pipe
shape and molding the pin-shaped terminal lugs 8a and 8b in resin. The electrical signal is taken
out by inserting the terminal lugs 8a, ab into the pipe-like portion and bringing the terminal lugs
into contact. In such a case, the following disadvantages occur. That is, as many terminals 3a, 3b,
5a, 5b and terminal lugs 4a + 4b, 8a, 8b are required by the number of the electrode flats 1a, 1k>
of the pressure-sensitive element 1, and one piece is inserted one by one. Also, since the
electrode flats 1a and 1b and the terminals 3a '' and 3b are connected by soldering, the number
of man-hours is also high and expensive. In the latter case, since it is difficult to use the pinshaped terminal lugs 8a and 8b alone, they are integrally molded with a resin to form the socket
9, but in this case, the insertion is not complicated. However, it becomes very expensive, and
localization of the two to four terminals 5a, 5b is difficult, and the structure of the case becomes
complicated. Therefore, the present invention is intended to provide a pickup cartridge for record
performance in which the above-mentioned drawbacks are solved. Hereinafter, an embodiment of
the first invention will be described with reference to the drawings. {Circle over (1)} The first
embodiment (see FIGS. 1 to 4) 11 is a damper made of synthetic rubber or the like, which is
made of piezoelectric ceramic or the like in the hole 12 provided in the damper 11. One end of
each power generation element or other pressure sensitive element 13 is inserted. Reference
numerals 14a and 14b denote a pair of terminal pieces, which are made of a flexible thin metal
plate, and include a flat portion 15, a fixing portion 16, and a curved portion 1175 having a
spring effect. The flat portion 15 is a damper block 11 and a pair of electrode flats 18 a of the
pressure sensitive element 13. Each of the terminal pieces 14a and 14b is held by the damper
block 11 by being held in contact with [111111] EndPage: 118b.
An armature 19 is attached to the other end of the pressure-sensitive element 13. 20a。 20b
is a pair of cases, and it has the said damper block 11, terminal piece 14a, 14b, and recessed part
2 L22, 23 for holding the fixing | fixed part 16 in it. Reference numeral 24 denotes a fixture for
the two cases 20a and 20b. Reference numeral 25 denotes a needle and the case 20a through a
screw 26 so as to abut on the armature 19. It is fixed to 20b. Reference numeral 27 denotes a
terminal lug plate, which is configured, for example, in a state in which a printed wiring board is
cut in a shape in which the insulator layer 29 is sandwiched between the conductive thin plates
28a and 28b. Reference numeral 30 denotes lead wires connected to the respective conductor
thin plates 28a and 28b, and a grip 31 is attached to the connection portion. The grip 31 is
provided by resin molding to facilitate easy handling of the terminal lug plate 27 alone. The
terminal lug plate 27 is provided with a hole 32. The terminal lug plate 27 is inserted through
the four portions 23 as shown in FIG. At this time, the terminal lug plate 27 is held between the
terminals 14a and 14b, and the conductor thin plates 28a and 28b are in contact with the
terminal pieces 14a and 14b. In this inserted state, protrusions 33a, 33b fitted in the holes 32
are provided on the terminal pieces 14a, 14b. FIG. 4 shows a modification of the terminal lug
plate 27. A part of the notch 34 is provided, and a tube 35 made of resin or the like is attached to
function as a grip without directly touching the electrode surface. It is {Circle over (2)} Second
Embodiment (refer to FIGS. 5 to 8) This embodiment shows an embodiment for stereo. Reference
numerals 36a and 36b denote pressure-sensitive elements, which are inserted into the holes 38
of the damper block 37 through the one ends thereof at an angle of about r. Terminal pieces 41a,
41b 142a, 42b are held in contact with each other between the damper block 37 and the
respective electrode surfaces 39a, 39b, 40a, 40b of the pressure-sensitive elements 36a, 36b.
The pressure sensitive element 36a. An armature 43 is mounted between the other ends 36b and
44a and 44b is a case, and the pressure sensitive element 36ata 6b, the damper block 37, and
the fixing portions 45a of the terminal pieces 1111111141a, 41b, 42a and 42b. It has a recess
47. 48, 49 for holding 45b, 46a, 46b. 50 is both cases 44a. Fixing eyelet 44b. A needle 51 is
attached to the case 44b so as to abut on the armature 43.
Reference numerals 52a and 52b denote terminal lug plates, which are thin conductive plates
53a and 53b 154a. 54b and insulator layers 55a and 55b. Reference numeral 56 denotes a lead
wire, which is connected to each of the conductive thin plates 53a, 53b, 54a, 54b. Each of the
terminal lug plates 52a and 52b is attached to the grip 57 with an angle corresponding to the
angle of attachment of the pressure sensitive elements 36a and 36b. Reference numeral 58
denotes a mounting board, and the case 44a. 44b and a pickup arm (not shown). Next, an
embodiment of the second invention will be described based on FIG. 9 and FIG. This embodiment
also applies to a stereo cartridge. Reference numerals 61a and 61b denote pressure-sensitive
elements, which are disposed substantially at 90 ° to each other, and each of the electrode
surfaces 62a. 62-b, 63 a, 63 b are in contact with two pairs of flexible and elastic terminal pieces
64 a, 64 b, 65 a, 65 b via the flat portion 66. Each of the two pairs of terminal pieces 64a, 64b
and 65a, 65b has a twisting portion 67 twisted about 45 ', and after being twisted, fixed to the
case 69 via the fixing portions 68. Be done. These two pairs of terminal pieces 64a, 64b and 65a,
65b have a bent portion γ0 'having a springing effect at the end opposite to the flat portion 66,
as shown in FIG. When inserted, the terminal lug plate 71 is held and held. Thus, the terminal lug
plate 71 inserted from the opening 73 formed at the rear of the case 69 has a middle layer 74
made of an insulator, and two planes 75a having conductivity independent of each other, 75b
and 76a. 76b and when inserted from the opening 73, as shown in FIG. 10, two pairs of terminal
pieces 64a, 64b and 65a, 65b and two pairs of conductive O.perpendicular surfaces 75a, 75b
and There are four independent electrical connections between 76a and 76b. Two pairs of
conductive planes 75 a of the terminal lug plate 71. Lead wires 77 are connected to the other
ends of the 75b and 76a, 76b, respectively. The pickup cart [1111111 EndPage: two pairs of
electrode surfaces 62a of the power generation or pressure sensitive elements 61a and 61b by
mechanical vibration of the needle tips of two ridges , 62b and 63a, 63b are devised to take out
electrical signals. As described above in the embodiments, the pickup cartridge for record playing
in the present invention has at least a pair of conductive planes on both sides of the plate-like
insulator with respect to each electrode surface of at least one pressure-sensitive element. A
plate-like terminal lug plate is used so that the electrode surface of the pressure sensitive
element and the conductive plane of the terminal lug plate can be simultaneously brought into
electrical and removable contact simultaneously by the terminal pieces made of a pair of metal
thin plates. In addition, one terminal lug plate is sufficient for monaural use, and two pairs of
electrode surfaces may be formed on two or three terminal lug plates for stereo use. In the case
of a stereo cartridge, since the electrodes can be taken out from the cartridge with one or two
terminal lug plates, the number of terminal lug plates is 1⁄2 or 1⁄4 of that in the prior art. It can
promote lower prices. Since the terminal lug plate can be socketed and can be attached and
detached very easily to the cartridge main body, the number of inserting steps can be reduced as
compared with the conventional one in which the terminal lug is inserted into the terminal one
by one. Also, misinsertion etc. is extremely reduced.
(2) It can be processed into a socket shape by cutting only a wide material with a shape in which
the insulator layer is sanded between two conductive thin plates, or by etching and then cutting a
part of the surface of the conductive thin plate The terminal lug plate can be manufactured in
large quantities very cheaply. W1111111
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