JPH039348Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is directed to a locking mechanism that is used, for example, to connect the radio cassette body and speaker box of a separate three-piece radio cassette and to carry the radio cassette as a unit. Regarding improvements.

BACKGROUND TECHNOLOGY AND PROBLEMS For example, a three-piece type radio cassette as shown in Fig. 1, in which the speaker can be separated from the main body, consists of a radio cassette main body (hereinafter simply referred to as the main body) 1 and a pair of left and right speaker boxes. (hereinafter simply referred to as a speaker) 2.
As shown in FIG. 2, the main body 1 and the speaker 2 are engaged with each other by a pair of protruding pieces 3 and 4, respectively, and are coupled to be slidable up and down. . Therefore, in order to connect the speaker 2 to the main body 1, the speaker 2 is inserted into the main body 1 from above, the protruding pieces 3 and 4 are engaged with each other, and then the locking member 5 as shown in FIG. The locking member 5 is fitted into the fitting hole 7 of the main body 1 by pinching the knob 6 and sliding it in the direction of arrow a.

However, as shown in FIGS. 3 and 4, the conventional lock member 5 has a click protrusion 8 on the side sliding surface and a long hole 9 passing through in the longitudinal direction. This long hole 9 is connected to the protrusion 10 of the speaker 2.
The lock member 5 is inserted into the guide groove 11. A restraining plate 12 having a size larger than the width of the elongated hole 9 is fixed to the protrusion 10 with a screw 13 to prevent the locking member 5 from coming off upward and in the sliding direction in FIG. Then, by sliding the lock member 5 in the direction of arrow a or b, the protrusion 8 engages with the recess 14a or 14b of the guide groove 11.
As a result, a click is felt and the lock member 5 is stopped at this click position, and the lock member 5 is attached to and detached from the main body 1.

However, in this conventional method, the holding plate 12 and the screw 13, which are separate parts, are required for attaching the lock member 5, and the screw 13 needs to be screwed in, resulting in an increase in cost.

Purpose of the invention The present invention was created in view of the above circumstances, and its purpose is to provide a locking mechanism that can be installed with a single touch without requiring any separate parts, and that also has a locking mechanism and a click function. .

Summary of the invention In order to achieve the above object, the present invention includes a rod-shaped lock member, a guide groove provided in the first housing for guiding the axial movement of the lock member, and a guide groove provided in the first housing to guide the axial movement of the lock member. and a fitting hole provided in the second casing to be engaged with one end of the locking member that protrudes from an opening disposed at one end of the guide groove when the locking member moves, and the first casing and the second casing, the locking member made of synthetic resin has a knob narrower than the locking member, and a claw and a protrusion each held via a beam having low bending rigidity. The guide groove has a slot extending from the opening along the axial direction of the guide groove and slidingly contacting the knob to guide the knob, and a claw of the locking member. A cutout hole into which the lock member is loosely fitted and a recess into which the protrusion is fitted in order to lock the lock member in a predetermined position are provided, and the lock member is inserted into the opening of the guide groove from the other end. When the locking member is assembled into the first casing, the knob of the locking member is guided into the slot, and the pawl and protrusion of the locking member are respectively guided into the guide groove by the deflection of the beam. After the locking member is assembled into the first casing, the claw protrudes due to the elasticity of the beam and is fitted into the cutout hole of the guide groove. The lock mechanism is configured to prevent the lock member from escaping from the first casing.

By configuring as described above, it is possible to provide a locking mechanism that can be attached with one touch without requiring any separate parts, and is equipped with a retainer and a click mechanism.

Embodiment An embodiment in which the present invention is applied to a three-piece radio cassette is shown in FIGS. 1, 2, and 5 below.
This will be explained with reference to Figures A to 7. Note that the first
2 and 2 have the same functions except that the locking member according to the present invention is now numbered 16, so a description thereof will be omitted. The lock member 16 is integrally molded from a synthetic resin into a rectangular shape with a substantially flat cross section, and has protruding edges 17 and 18 on both the front and back surfaces around the lock member 16. The central portion 20 surrounded by the edges 17 and 18 is formed relatively thin in order to reduce bending rigidity in the thickness direction. Further, a pair of elongated holes 19a and 19b having a predetermined length are formed inside the edges 17 and 18 on both sides of the rear portion in the longitudinal direction,
Portions of the edges 17 and 18 facing the elongated holes 19a and 19b, respectively, become beam portions with low bending rigidity in the lateral direction. Of the two long holes mentioned above, the long hole 19a
A semicircular protuberance 22 is elastically supported by the beam portion 21 and protrudes outward through the beam portion 21 facing the front side. Also, on the back side of the lock member 16, there is a long hole 1.
Between 9a and 19b, the claw 23, which is composed of surfaces 23a and 23b as shown in FIG. 6A and has a right triangular cross section, forms a beam portion with lower bending rigidity due to the elongated holes 19a and 19b. It is elastically supported by the portion 20 and is provided in a protruding manner. and surface 23a
is located in front of the surface 23b and is formed substantially perpendicular to the sliding direction, and the surface 23b is tapered. Note that the reference numeral 6 is the same knob as described above.

On the other hand, the speaker 2 is formed with a guide groove 25 in which the lock member 16 is housed and slides therein, and a pair of longitudinal protruding pieces are provided at the upper part of the guide groove 25 in FIG. 26a and 26b are provided to protrude inwardly from each other, and this pair of protruding pieces 2
Between 6a and 26b, there is a slot that extends along the axial direction of the guide groove 25 from an opening provided at one end of the guide groove 25 and that can slide into sliding contact with the knob 6 and guide the knob 6. It is formed.

Next, at predetermined positions on the inner surface of the guide groove 25, there are two semicircular recesses 2 into which the protrusions 22 are engaged.
7a and 27b are formed adjacent to each other at a predetermined interval. Further, a cutout hole 28 is formed in the bottom plate through which the claw 23 moves, and an inner end surface 28a of the cutout hole 28 in the direction of arrow a is connected to the claw 23.
It serves as a stopper (Figure 6A). As shown in FIG. 5A, a strip-shaped stopper 29 is formed on the rear end surface of the guide groove 25.

In order to install the lock member 16 configured as described above into the guide groove 25, as shown in FIG. 6B,
Insert and push the rear end of the lock member 16 into the guide groove 25 from the direction of arrow b. Then, the protrusion 22 is provided on the thin beam portion 21, and the protrusion 22
Since it is formed into a smooth semicircular shape, the beam portion 21 is elastically deformed as shown in FIG. 5B, and the protrusion 2
2 is inserted into the guide groove 25. At the same time, the center portion 20 of the locking member 16 is formed thin as described above, and the claws 23 are formed in the elongated holes 19a and 19b.
Since the claw 23 has a tapered surface 23b facing backward, the locking member 1
6 is elastically deformed to a state where the pawl 23 rides on the bottom surface of the guide groove 25, as shown in FIG. 6B.
Therefore, if you push it further in this state, the lock member 1
6 moves in the direction of arrow b, the claw 23 eventually falls into the cutout hole 28, and the protrusion 22 further falls into the recess 27a.
When engaged, a click feeling is obtained.

Then, when pushed further in the direction of arrow b, the beam portion 21
curves inward again as shown in Figure 5B, and the protrusion 2
2 jumps out of the recess 27a and rides on the inner wall of the guide groove 25. Then, this protrusion 22 eventually engages with the rear recess 27b and a click feeling is obtained, thereby completing the installation of the locking member 16, which is shown by the dashed line in FIGS. 5A and 6A. It is stored in the guide groove 25 in a state where it is closed. At this time, even if the lock member 16 is pushed further in the direction of arrow b, the rear end surface of the lock member 16 contacts the stopper 29, so the protrusion 22 will not pop out and move any further. Further, as shown in FIG. 7, the upper end surface of the locking member 16 is always restricted by the protruding pieces 26a and 26b, so that it will not slip upward.

Next, the operation of the lock member 16 constructed as above will be explained. From the state where the locking member 16 is stored, as shown by the dashed line in FIGS. 5A and 6A, pinch the knob 6 to lock the locking member 1.
6 in the direction of arrow a, the protrusion 22 of the locking member 16 moves into the recess 27 as explained in FIG. 5B.
Since it pops out from b and engages with the adjacent recess 27a, a click feeling is obtained at this time. The locking member 16 is then fitted into the fitting hole 7 of the mating body 1 as described above, thereby connecting the speaker 2 and the body 1. In addition, in this state, the protrusion 22
is engaged with the recess 27a, so the lock member 1
6 will not move freely and the above connection will not come off. Also, at this time, even if you try to slide the lock member 16 any further in the direction of arrow a, the right angle surface 2 of the claw 23
3a abuts against the inner end surface 28a of the cutout hole 28, there is no possibility that the lock member 16 will slip out in the direction of arrow a.

Next, when the lock member 16 is pushed in the direction of the arrow b, the lock member 16 moves in the direction of the arrow b, the protrusion 22 comes out of the recess 27a and engages with the recess 27b, and a click feeling is obtained, as described above. As mentioned above, the lock member 16 does not slide freely in this state.

Effects of the invention As explained above, according to the invention, the locking member is made of synthetic resin, and the plurality of protrusions provided in order to provide the locking member with a retainer and a click mechanism are bent, respectively. Since it is configured to be elastically supported by a beam portion with low rigidity, it can be easily attached by utilizing the elastic deformation of the beam portion, and is provided with the necessary retainer and click mechanism.
As a result, according to the present invention, the number of parts can be reduced, and the number of assembly steps can also be reduced, resulting in lower costs.

[Brief explanation of the drawing]

Fig. 1 is a front view of a three-piece type radio cassette, Fig. 2 is an enlarged partial sectional view taken along the - arrow in Fig. 1, Fig. 3 and Fig. 4 show a conventional example, and Fig. 3 shows the main body side. FIG. 4 is a sectional view taken along the - line in FIG. 2, with the exception of FIG. Figures 5A to 5B and Figures 6A to 6B are similar to Figures 3 and 4, respectively; Figures 5B and 6 are similar to Figures 3 and 4;
Figure B is a diagram showing a state of deformation during sliding, and Figure 7 is a sectional view taken along the - line in Figure 5A. In the symbols used in the drawings, 1...radio cassette body (second housing), 2...speaker box (first housing), 6...knob, 7...
... Fitting hole, 16 ... Lock member, 21 ... Beam part,
22... Protrusion, 23... Claw, 25... Guide groove, 2
7a, 27b...recessed portions, 28...cutout holes.

Claims (1)

[Claims for Utility Model Registration] Rod-shaped lock member 16 and this lock member 16
a guide groove 25 provided in the first housing 2 to guide the axial movement of the lock member 16; A fitting hole 7 provided in the second housing 1 to be engaged with one end of the member 16
In the locking mechanism for locking the first casing 2 and the second casing 1, the locking member 16 made of synthetic resin has a knob 6 narrower than the locking member 16, and a bending mechanism. A pawl 23 and a protrusion 22, which are each held through a beam portion with low rigidity, are integrally provided in a protruding manner. A slot for slidingly contacting the knob 6 and guiding the knob 6, a cutout hole 28 into which the claw 23 of the locking member 16 is loosely fitted, and a protrusion 22 for securing the locking member 16 in a predetermined position. A plurality of recesses 27a, 2 to be fitted
7b, and the lock member 16 is provided at the opening of the guide groove 25.
When assembling the lock member 16 into the first housing 2 by inserting the lock member 16 from the other end, the lock member 16
The above-mentioned knob 6 is guided into the above-mentioned slot, and the above-mentioned pawl 23 and protrusion 22 of the locking member 16
The guide groove 2 is caused by the deflection of the beam portion, respectively.
5, and after the locking member 16 is assembled into the first housing 2, the claw 23 protrudes due to the elasticity of the beam and fits into the cutout hole 28 of the guide groove 25. , thereby causing the first locking member 16 to
A lock mechanism that prevents the device from escaping from the casing 2.