JPH04105230U - coil spring - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably prevent entanglement between the windings of a coil spring. [Structure] In a coil spring 20 having a spirally wound wire portion 21, a small diameter portion 21a on one end side of the winding portion 21
In addition, a core rod portion 22 that extends outward from the large diameter portion 21b at the other end of the winding portion 21 toward the center of the winding portion 21 is continuously and integrally molded.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on the compressed material used in battery terminal members that come into contact with the battery's negative (-) terminal. It relates to coil springs such as coil springs.

0002

[Conventional technology]

For example, electronic devices such as tape recorders use primary batteries or secondary batteries. A compression coil spring is used as a battery terminal member corresponding to the negative terminal of the battery. child This will be explained in detail with reference to FIG. 11. 100 is a compressed battery terminal member. A coil spring that comes into contact with the - terminal of a dry cell battery used in a tape recorder. It is. This compression coil spring 100 has a small diameter at one end and gradually decreases toward the other end. It has a winding part 101 that is spirally wound so that each part has a larger diameter. This winding part The small diameter portion 101a of 101 is designed to come into contact with the negative terminal of the dry cell battery. In addition, the end portion 102 of the winding portion 101 on the large diameter portion 101b side is bent into a predetermined shape. It extends away from the small diameter portion 101a side and is attached to a printed circuit board (not shown). It is designed to be connected to a wiring pattern, etc.

0003

[Problem that the idea aims to solve]

However, in the conventional compression coil spring 100, the winding portion 101 is under pressure. Because of its compressed shape, it can be used, for example, as a compression coil in the tape recorder assembly process. Two or more springs 100 are collected and housed in one case etc. and subjected to the above process. As shown in FIG. The winding portion 101 of the spring 100 became entangled, making it difficult to remove it. this To deal with this, take out the compression coil springs 100 one by one in advance and place them in a magnetic ball. Place the compression coils in a case with a partition frame, etc. I used to separate the springs 100 one by one and put them back together for use, but the above assembly An extra step is required to make it easy to take out the compression coil spring 100 in advance during the process. It was essential and complicated.

0004 Therefore, this idea allows you to collect two or more coil springs in one storage case etc. To provide a coil spring in which winding portions are never entangled.

[0005]

[Means to solve the problem]

In a coil spring having a spirally wound wire portion, one end side of the winding portion is A core rod portion is provided that extends toward the center of the winding portion and projects toward the other end.

[0006]

[Effect]

A core rod portion on one end side of the winding portion and extending toward the center of the winding portion and protruding toward the other end. Even if the windings of the coil springs try to intertwine with each other, the core rod inside the windings will The wires of the coil spring do not get in the way and penetrate deeper than the core rod, and the windings of the coil spring are connected to each other. No entanglement phenomenon occurs. This allows coils to be used in the assembly process of electronic devices, etc. When using springs, the process of taking out the coil springs one by one in advance, as in the conventional method. Even without the coil springs, you can easily take out the coil springs one by one, reducing the overall assembly process. This will further reduce the number of industrial man-hours and improve work efficiency.

[0007]

【Example】

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings. In Figures 1 and 8, 1 is - A recorder (electronic device) that can receive radio reception. This tape player The outer casing of the coder 1 includes a box-shaped front cabinet 2 made of synthetic resin and open on the rear side. The front side is open and the front edge overlaps the rear edge of the front cabinet 2, not shown. A box-shaped rear cabinet 3 made of synthetic resin that fixes the front cabinet 2 with screws etc. and one end side covers the joint part of the upper surface side of the front and rear cabinets 2 and 3, and the middle The center part protrudes like an arcuate plate, and the other end is located on the bottom side of the front and rear cabinets 2 and 3. It is comprised of a grip part 4 extending to the joint part.

[0008] On the bottom side of the rear cabinet 3, there is a battery compartment that can be opened and closed with a lid 5 made of synthetic resin. The storage part 6 is integrally molded. This battery storage part 6 is a box-shaped part with a cylindrical shape, and has a plurality of parts. It is formed in a size that can accommodate the dry battery 40. As shown in Figures 2 to 4, this A negative electrode (-) compression coil spring (battery terminal member) 20 is attached, and the battery terminal for the positive electrode (+) is attached to the standing wall portion 8 on the other end side. A child spring (battery terminal member) 30 is attached.

[0009] As shown in FIGS. 2 and 3, the upright wall section 7 of the battery storage section 6 has a concave inner center. A substantially U-shaped vertical slit groove 7b is formed in the center of the recess 7a. It has been done. Further, the inner side wall of the battery storage section 6 on the inner surface of the rear cabinet 3 An inverted L-shaped claw part (locking part) 10 is installed at a position in front of the part 9 near the standing wall part 7. The body is molded to protrude. The rear cabinet 3 facing the tip of the claw part 10 has a An escape hole is formed during plastic molding of the claw portion 10 (molding using a push-cut mold). It will be done. This relief hole serves as the inspection hole 11 for exposing the compression coil spring. this The inspection hole 11 is formed into a rectangular shape with predetermined dimensions in accordance with safety standards. Furthermore, after the above The compression coil spring is located on the inner surface of the cabinet 3 at a position adjacent to the claw portion 10. 20 and a cylindrical boss 12 for fixing the printed circuit board 41 with screws 42 are integrated. It is protrudingly molded.

0010 The compression coil spring 20 (hereinafter referred to as a coil spring) is shown in FIGS. 2 to 4 and 6. As shown, the diameter gradually increases from the small diameter portion 21a at one end to the large diameter portion 21b at the other end. It has a winding part 21 spirally wound in the right direction so that each part has a larger diameter. this The small diameter portion 21a of the winding portion 21 is brought into contact with the negative terminal 40b of the dry battery 40. At the same time, the end of the small diameter portion 21a has a center (center) inside the winding portion 21. A core rod portion 22 that extends outward from the large diameter portion 21b is continuously and integrally formed. It has been done. The length of this core rod portion 22 is longer than the total length of the winding portion 21; The tip 22a protrudes outward from the large diameter portion 21b of the winding portion 21 by a predetermined length. Also, above The wire portion 23 on the large diameter portion 21b side of the winding portion 21 has a horizontal portion 23a, a bottom portion 23b, and a ring. The ring portion 23c is formed by bending the winding portion 2. It extends forward from the small diameter portion 21a of No. 1. Incidentally, the coil spring 20 has a winding portion thereof. Although small and large diameter portions 21a and 21b are formed on both sides of 21, other embodiments shown in FIG. The diameters on both sides of the winding portion 21' may be made the same as in the coil spring 20'.

[0011] The coil spring 20 has its winding portion 21 located within the battery storage portion 6. At the same time, the wire portion 23 is located outside the battery storage section 6. It is installed so that it can be placed. That is, the large diameter of the winding portion 21 of this coil spring 20 The portion 21b is fitted into the recess 7a of the upright wall portion 7 of the battery storage portion 6. Koto The core rod part 22 in the winding part 21 is inserted into the slit groove 7b of the upright wall part 7. However, the tip 22a is younger than the upright wall portion 7 in the spring free length of the winding portion 21. The coil spring 20 is designed to be exposed outside so that it does not come off easily. . Further, the horizontal portion 23a of the wire portion 23 of the coil spring 20 is connected to the horizontal portion 23a of the wire portion 23 of the coil spring 20. It is placed on the upper surface of the standing wall portion 7, and its ring portion 23c is placed inside the rear cabinet 3. It is placed on the boss 12 that protrudes from the surface, while the back portion 23b of the wire portion 23 is placed on the rear cap. It is engaged with a claw portion 10 protruding from the inner surface of the vignette 3. This allows the above-mentioned post-cache The wire portion 23 of the coil spring 20 is exposed through the inspection hole 11 of the vignette 3. Sara The printed circuit board 41 is attached to the ring portion 23c of the wire portion 23 of the coil spring 20. These are placed together and fixed to the boss 12 via screws 42. This is it The coil spring 20 is connected to a wiring pattern (not shown) on the printed circuit board 41. It is done.

0012 The upright wall section 8 of the battery storage section 6 has a box shape with a partition wall section 8a in the center. It is integrally molded to protrude from the rear cabinet 3. Partition wall portion 8a of this standing wall portion 8 Triangular prism-shaped claw portions (locking portions) 13 are integrally molded on the outer surface closer to the inside. Ru. The rear cabinet 3 facing this claw part 13 has plastic of the claw part 13. Escape holes are formed during block molding (molding using a push-cut mold). This escape hole is in front This is an inspection hole 14 for exposing the battery terminal spring. This inspection hole 14 meets safety standards. It is formed into a rectangular shape with predetermined dimensions. Furthermore, the inner surface of the rear cabinet 3 is The battery terminal spring 30 and the printer are located at a predetermined distance apart from the claw portion 13. A cylindrical boss 15 for fixing the top board 41 with screws 43 is integrally molded to protrude. Ru.

[0013] As shown in FIG. 5, the battery terminal spring 30 is approximately U-shaped from the front and double-shaped from the side. It has a terminal abutting portion 31 that is bent and formed so as to be formed. This terminal contact part 3 The central part of 1 is fitted into the upright wall part 8 with the partition wall 8a as a boundary, and Its tip engages with a recess 3a formed on the inner surface of the rear cabinet 3, and The + terminal 40a of the dry cell battery 40 is brought into contact between the center portion and the tip portion. ing. Further, a horizontal portion 3 is provided in the wire portion 32 extending from one end of this terminal abutting portion 31. 2a and ring portion 32b are formed by bending. And the above battery terminal The horizontal portion 23a of the wire portion 32 of the spring 30 is attached to the outer surface of the upright wall portion 8 of the battery storage portion 6. It is locked to the claw part 13 which is integrally formed and the ring part 32b is attached to the rear cabin. It is placed on a boss 15 protruding from the inner surface of the net 3. This allows the above-mentioned post-cache The wire portion 32 of the battery terminal spring 30 is exposed through the inspection hole 14 of the vignette 3. Ma In addition, the printed circuit board 41 is attached to the ring portion 32b of the wire portion 32 of the battery terminal spring 30. are placed thereon and are fastened together to the boss 15 via screws 43. to this Therefore, the battery terminal spring 30 is connected to the wiring pattern (not shown) of the printed circuit board 41. It is connected.

[0014] In addition, in FIG. 8, 50 is a checking device. This check device 50 is L-shaped. jig table 51 and + and - terminals extendably provided on the side 51a of this jig table 51. A pair of contact pins (check pins) 52 and 53 for abutting battery terminal members, and each A power supply unit 54 connected to contact pins 52 and 53 and a shaft for each contact pin. It has a receiver 55 etc. The tape recorder 1 is installed on the bottom 51b of the jig stand 51. A guide portion 51c is provided for when cutting. In addition, the pair of contact pins 5 2 and 53 are a pair of inspection holes 14 formed in the rear cabinet 3 of the tape recorder 1. , 11, respectively. In addition, 16 in Figures 1 and 8 is It is a group of operation buttons such as start and stop, and 17 is an antenna.

[0015] According to the tape recorder 1 of the embodiment described above, the battery negative electrode of the battery storage section 6 is Since the coil spring 20 with the core rod part 22 is used as the terminal member, the tape In the assembly process of the recorder 1, it is integrally molded on the inner surface of the rear cabinet 3. Collect two or more coil springs 20 when assembling them on the upright wall 7 of the battery compartment 6. Even if the coil springs 20 are placed in a Don't get involved. Therefore, the entanglement phenomenon between the winding portions 21 of the coil spring 20 occurs. do not have. Therefore, as in the conventional assembly process, the coil springs are assembled one by one in advance. Eliminates the need to separate the parts and make them easy to take out, greatly reducing overall assembly man-hours. This can be reduced to facilitate assembly work.

[0016] Further, the coil spring 20 attached to the upright wall portion 7 of the battery storage portion 6 is The large diameter portion 21b is fitted into the recess 7a of the standing wall portion 7, and the wire rod portion 23 is The portion 23c is placed on the boss 12 protruding from the inner surface of the rear cabinet 3, and A claw portion 10 in which a midway portion of the back portion 23b of the wire rod portion 23 protrudes into the inner surface of the rear cabinet 3. It is installed in a locked state. For this reason, the upright wall portion 7 of the battery storage portion 6 is When installing the coil spring 20, do not allow the coil spring 20 to come off from the upright wall portion 7. The ring portion 23c of the wire portion 23 of the coil spring 20 and the printed circuit board 41 are It can be easily fixed to the boss 12 with one screw 42. At this time, The wire portion 23 of the coil spring 20 is exposed through the inspection hole 11 of the rear cabinet 3 and can be seen. can be done.

[0017] Furthermore, a battery terminal for a battery positive electrode attached to the upstanding wall portion 8 of the battery storage portion 6 is provided. The spring 30 has its terminal abutting portion 31 connected to the recess 3a of the rear cabinet 3 and the upright wall portion 8. At the same time, the ring portion 32b of the wire portion 32 is fitted to the inner surface of the rear cabinet 3. It is placed on the protruding boss 15, and the wire portion 32 protrudes from the upright wall portion 8. It is latched to the claw portion 13 that is attached. Therefore, a battery terminal is provided on the upright wall portion 8 of the battery storage portion 6. When installing the spring 30, the battery terminal spring 30 does not come off from the upright wall portion 8. The ring portion 32b of the wire portion 32 of the battery terminal spring 30 and the printed circuit board 41 are connected to the boss 15. It can be easily fixed with one screw 43. At this time, the above battery terminal The wire portion 32 of the spring 30 is exposed through the inspection hole 14 of the rear cabinet 3 and can be seen. can.

[0018] Also, check the electrical system etc. of the assembled set of tape recorder 1. If so, check by putting the required number of batteries in and out of the battery compartment each time. was working. However, in the above tape recorder 1, the rear cabinet A pair of inspection holes 14.3 through which a portion of the battery terminal spring 30 and the coil spring 20 are exposed. 11, the checking device 5 can be used without putting the dry battery 40 into the battery storage section 6. The tape recorder 1 is moved along the guide portion 51c of the jig stand 51 of The wire portion 32 of the battery terminal spring 30 and the coil bar exposed through the pair of inspection holes 14 and 11 A pair of contact pins 52 and 53 of the checking device 50 are attached to the wire portion 23 of the screw 20. By contacting and energizing the electrical system of the tape recorder 1 set, You can easily perform tasks such as checking the settings and measuring with one touch. This is it It is possible to significantly reduce the man-hours required for checking work. It has the advantage of not requiring particularly expensive jigs and equipment. Furthermore, each of the above The inspection holes 14 and 11 are escape holes created when the claw parts 13 and 10 are molded with plastic. Since the inspection holes 14 and 11 can be formed at low cost, , each contact pin 52 is formed to have a predetermined rectangular size in accordance with safety standards. , 53 is easy to enter.

[0019] In addition, according to the above embodiment, a tape recorder was explained as an electronic device. , may be applied to other electronic devices. In addition, coil springs are compression coils for battery terminal members. It is not limited to coil springs, but can be applied to other applications and functions such as tension and compression coil springs. Of course.

[0020]

[Effect of the idea]

As described above, according to this invention, there is a In the past, a core rod part was provided that protruded to the other end, so the winding parts of the coil spring could not get entangled with each other. Even if you try to fit them together, the core rod inside the winding will get in the way and may get deeper than the core rod. Therefore, it is possible to reliably prevent entanglement between the winding portions of the coil spring. As a result, when using coil springs in the assembly process of electronic devices, etc., The process of making it easy to take out the coil springs one by one in advance is no longer necessary, and all The number of man-hours required for assembling the body can be reduced and work efficiency can be further improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tape recorder showing an embodiment of this invention.

FIG. 2 is an exploded perspective view of essential parts of the tape recorder.

FIG. 3 is a plan view of main parts of the tape recorder.

FIG. 4 is a sectional view taken along line A-A in FIG. 3;

FIG. 5 is an exploded perspective view of other essential parts of the tape recorder.

FIG. 6 is a perspective view of a coil spring used in the tape recorder.

FIG. 7 is a perspective view of another embodiment of a coil spring.

FIG. 8 is a perspective view showing the tape recorder in a state before checking work.

FIG. 9 is a cross-sectional view of the -terminal side showing the tape recorder in a checking operation state.

FIG. 10 is a cross-sectional view of the + terminal side showing the tape recorder in a checking operation state.

FIG. 11 is a perspective view showing a state in which conventional battery coil springs are entangled with each other.

[Explanation of symbols]

20, 20'... Coil spring, 21, 21'... Winding part, 2
2... Core rod part.

Claims (1)

[Scope of utility model registration request] 1. A coil spring having a spirally wound wire portion, wherein a core rod portion is provided at one end side of the winding portion and extends toward the center of the winding portion and protrudes from the other end. A coil spring featuring: