TW201711301A - Heart cam locking apparatus preventing an engagement pin portion of a locking pin from being lifted - Google Patents

Abstract

This invention provides an apparatus for preventing an engagement pin portion of a locking pin from being lifted in a push-in/push-out type heart cam locking apparatus. The heart cam locking apparatus (9) is formed with a sliding groove portion (19) around a heart cam portion (18). A top end engagement portion (30) of the locking pin (20) is pressed against an extrusion spring (21) when being pushed in, slides on an outward side of the sliding groove portion (19), and is engaged with a pin engagement recessed portion (27) of the heart cam portion (18). The engagement portion is pressed against the extrusion spring (21) when being pushed out, is disengaged from the pin engagement recessed portion (27), and slides on an inward side, so that the top end engagement portion (30) is allowed to return to an original position by the extrusion spring (21). At the lower end portion of the pin engagement recessed portion (27), the heart cam locking apparatus (9) is formed with a concave hole (31) engaged in the lower end portion of the top end engagement portion (30).

Description

Heart cam lock

The present invention relates to a heart-shaped cam lock device provided in a push-in/out type card connector or the like using a heart-shaped cam.

The applicant has proposed a scheme of such a heart-shaped cam locking device (JP-A-2015-60627).

In the case of FIG. 7 , the card connector 1 includes a housing 3 having a card insertion portion 2 and a plurality of contacts (not shown) provided in the card insertion portion 2 . In FIGS. 5 and 6, the card connector 1 has an ejecting device 5 that moves inside the casing 3 together with the card A, an extrusion spring 6, a heart-shaped cam 7, and a pin guiding groove 8, which is disposed on the heart-shaped cam. And a locking pin 43, the engaging pin portion 4 of one end of the locking pin 43 is slidably inserted into the pin guiding groove 8, and the other end of the locking pin 43 is swingably supported by the ejection device 5, Thereby, a push-in/out type heart-shaped cam locking device is constructed.

In such a configuration, when the engaging pin portion 4 reaches the end position b of the outward groove 50 by the first push-in operation of the card A, the movement toward the outward groove 50 is performed by the step portion 54a. By being restricted, the engagement force is released at this position b, and the engagement pin portion 4 is moved to the position c in the engagement recess 56 of the heart cam 7. When the engaging pin portion 4 is moved into the engaging recess portion 56, as shown in Figs. 5 and 6(a), the engaging pin portion 4 is engaged with the heart-shaped cam 7, and the ejecting device 5 is locked.

At this time, the engaging pin portion 4 is engaged with the engaging recess portion 56, abuts against the reinforcing abutting portion 57 disposed inside the engaging recess portion 56, and is resistant to the heart shape by the metal reinforcing member 55 having high strength. The load that the cam 7 receives from the engaging pin portion 4.

When the push-out operation of the card A is performed to release the lock, the movement of the step portion 54b toward the outward movement groove 50 is restricted, and when the engagement pin portion 4 is moved to the end stop position d, When the pushing force is released at the position d, the movement of the step portion 54c toward the engaging recess portion 56 is restricted, and the ejecting device 5 is moved by the pressing of the extrusion spring 6, and the engaging pin portion 4 passes through the return groove 51. And returning to the origin position a from the shuttle unit 53.

Problems to be solved by the invention

In Fig. 6(a), the standing wall of the engaging recess 56 constituting the heart-shaped cam 7 is formed at a right angle to the horizontal plane of the heart-shaped cam 7 and the outer casing 3, and is formed in a straight line. Further, the engaging pin portion 4 of the locking pin 43 is formed. It is also the same linear shape as the engaging recess 56, and therefore, the force of the push-down spring 42 formed when the mask cover 45 is cut is smaller than the pulling force of the extrusion spring 6, or a gap is generated between the push-down spring 42 and the lock pin 43. As shown in FIG. 6(b), only the contact point of the engaging pin portion 4 and the engaging recess portion 56 is provided at the upper end portion of the engaging recess portion 56, and the engaging pin portion 4 is lifted up and passed over the heart-shaped cam 7 The danger of being out of lock, or the push/pull action cannot be performed normally.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for preventing an engagement pin portion of a lock pin from being lifted in a push-in/pull type heart-shaped cam lock device.

Solution to solve the problem

The heart-shaped cam lock device 9 of the present invention is formed with a sliding groove portion 19 around the heart-shaped cam portion 18, and the top end engaging portion 30 of the lock pin 20 resists the extrusion spring 21 when pushed in, on the outward side of the sliding groove portion 19. Sliding engages with the pin engagement recess 27 of the heart-shaped cam portion 18, and resists the engagement of the extrusion spring 21 and the engagement of the pin engagement recess 27, and slides on the return side, and the top end engagement portion is passed by the extrusion spring 21 The returning position 30 is returned to the original position, and a recessed hole 31 for locking the lower end portion of the distal end engaging portion 30 is formed at a lower end portion of the pin engagement recessed portion 27.

The recessed hole 31 of the present invention is constituted by a semicircular recessed portion 31a formed on the lower end wall surface of the pin engagement recessed portion 27 on the side where the lower end portion of the distal end engaging portion 30 contacts.

Further, the present invention is characterized in that the recessed hole 31 is formed by the semicircular recessed portion 31a formed on the lower end wall surface of the pin engaging recessed portion 27 on the side where the lower end portion of the distal end engaging portion 30 contacts. The concave portion 31a is configured to communicate with the lower semicircular hole portion 31b.

Further, in the present invention, the pin engagement recess 27 and the distal end engagement portion 30 may be straight with respect to the lead, and the lower end portion may be inclined inward, and the recessed hole 31 may be formed in the inclined lower end wall surface.

Effect of the invention

According to the invention of one aspect of the present invention, since the heart-shaped cam locking device is formed with a sliding groove portion around the heart-shaped cam portion, the top end engaging portion of the locking pin resists the extrusion spring at the sliding groove portion when pushed in. The outward side slides, engages with the pin engagement recess of the heart-shaped cam portion, resists the extrusion spring during ejection, disengages from the pin engagement recess, slides on the return side, and returns the top engagement portion to the return spring by the extrusion spring In the original position, the heart-shaped cam lock device has a concave hole that locks the lower end portion of the distal end engagement portion at the lower end portion of the pin engagement recess, and therefore has the following effects.

Even if the push-down spring portion has a smaller tensile force than the extrusion spring, or a gap is formed between the push-down spring portion and the lock pin, the lower end portion of the top end engagement portion is caught in the recessed hole to prevent the top end engagement portion from being lifted. The push/launch action is performed normally.

Further, when the heart-shaped cam lock device of the present invention is used for the card connector, the position of the lock pin of the pin engagement recess portion of the heart-shaped cam portion accommodated in the card lock state is always set at a fixed position. That is, in the position where the card is locked, since the recessed hole is formed in the pin engagement recessed portion of the heart-shaped cam portion, the distal end engaging portion of the lock pin is housed in the recessed hole.

According to the invention of claim 2, since the recessed hole is formed by a semicircular recess formed in the wall surface of the lower end portion of the pin engaging recess formed on the side where the lower end portion of the distal end engaging portion contacts, the top end of the locking pin The lower end portion of the engaging portion is reliably caught, and the top end engaging portion can be prevented from being lifted more reliably.

According to the invention of the third aspect of the present invention, the semicircular recess of the lower end wall surface of the pin engagement recess formed on the side where the lower end portion of the distal end engaging portion is in contact with the concave hole, and the semicircular shape from the semicircular shape Since the concave portion is connected to the lower semicircular hole portion, it is particularly effective when the heart-shaped cam locking device of the present invention is used for the card connector. According to the invention of claim 4, the lower end portion is inclined inward with respect to the lead straight line by the pin engagement recess portion and the distal end engaging portion, and a recessed hole is formed in the inclined lower end wall surface to prevent the locking pin The top snap is raised.

In the present invention, the heart-shaped cam locking device 9 is formed with a sliding groove portion 19 around the heart-shaped cam portion 18, and the top end engaging portion 30 of the locking pin 20 resists the extrusion spring 21 at the time of pushing in, and the traveling portion of the sliding groove portion 19 The side slides, and engages with the pin engagement recessed portion 27 of the heart-shaped cam portion 18, and resists the extrusion spring 21 at the time of pushing out, and is disengaged from the pin engagement recess 27, and slides on the return side, and the top end is engaged by the extrusion spring 21. The portion 30 returns to the original position, and the heart-shaped cam lock device 9 has a recessed hole 31 that locks the lower end portion of the distal end engagement portion 30 at the lower end portion of the pin engagement recess portion 27.

The recessed hole 31 is constituted by a semicircular recessed portion 31a formed on the lower end wall surface of the pin engagement recessed portion 27 on the side where the lower end portion of the distal end engaging portion 30 contacts.

The recessed hole 31 may be constituted not only by the semicircular recessed portion 31a formed on the lower end wall surface of the pin engaging recessed portion 27 on the side where the lower end portion of the distal end engaging portion 30 contacts, but also may be connected from the semicircular recessed portion 31a to The lower semicircular hole portion 31b is formed.

Both the pin engagement recessed portion 27 and the distal end engagement portion 30 may be in a straight line, and the lower end portion may be inclined inwardly with respect to the lead straight line, and the recessed hole 31 may be formed in the inclined lower end wall surface.

[Example 1]

Hereinafter, embodiments of the invention will be described based on the drawings.

Figure 4 (a) shows a card connector 10 equipped with a heart-shaped cam locking device 9 of the present invention, the card connector 10 being separated from the card insertion opening 14 at the lower end portion of the figure by a card insertion opening 14 The cover 12 is spatially covered. Further, at the center of the upper surface of the card connector 10, a plurality of (in this example, six) "へ"-shaped contacts 25 are provided at positions corresponding to the pads of the inserted card 15, at the upper end in the figure. The portion is provided with an ejecting leaf spring 26, and the heart-shaped cam locking device 9 of the present invention is provided at the right edge portion in the drawing.

The heart-shaped cam locking device 9 is formed with a heart-shaped cam portion 18 near the upper end portion of the outer casing 11 in the figure, and a sliding groove portion 19 for sliding the locking pin 20 is formed around the heart-shaped cam portion 18, which The sliding groove portion 19 extends to the position of the pin slider 22 near the lower end portion in the drawing. The pin slider 22 is integrally provided with a spring compression member 23, and an extrusion spring 21 is provided between the spring compression member 23 and the spring receiving portion 32 in the vicinity of the upper end portion in the drawing. Further, a card engagement slider 24 that integrally moves by insertion of the card 15 (or the card tray 16 to which the card 15 is fitted) is provided on the opposite side of the extrusion spring 21 via the pin slider 22.

More details of the heart cam lock device 9 will be described based on Fig. 1 (a), Fig. 1 (b), and Figs. 2 (a) and 2 (b).

In these figures, a sliding groove portion 19 is provided around the heart-shaped cam portion 18, and the sliding groove portion 19 is continuous from the position of the point S of Fig. 4(a). The depth of the sliding groove portion 19 is as shown in Fig. 2(b), and has four steps of steps 54a, 54b, 54c, and 54d and is surrounded by one circumference.

As shown in Fig. 1(b), the distal end portion of the lock pin 20 is a distal end engaging portion 30 that is bent downward, and the proximal end portion constitutes a vertical proximal end shaft portion 29. The base end shaft portion 29 is swingably fitted to the swing shaft hole 28 of the pin slider 22.

In particular, the present invention is characterized in that the pin engagement recess 27 which is tapered in the middle of the heart-shaped cam portion 18 is formed with the recessed hole 31. The recessed hole 31 is cut out from the vertical wall surface of the pin engagement recessed portion 27 into a semicircular recessed hole 31a such that the dummy nail is turned over, communicates with the semicircular recessed portion 31a, and engages the front surface of the recessed portion 27 with the pin. A semicircular hole portion 31b is formed through a portion of the sliding groove portion 19 so as to be grooved. The semicircular hole portion 31b is formed such that only a part of the lower end portion of the distal end engaging portion 30 of the locking pin 20 is engaged with the lower end portion.

With the configuration as described above, even if the force of the push-down spring portion 13 is smaller than the tensile force of the extrusion spring 21, or a gap is generated between the push-down spring portion 13 and the lock pin 20, as shown in Fig. 1(b), The lower end portion of the distal end engaging portion 30 is also caught in the concave hole 31 formed by the semicircular concave portion 31a and the semicircular hole portion 31b, and the distal end engaging portion 30 is prevented from being lifted up, and the pushing/extracting operation is normally performed.

Further, when the heart-shaped cam lock device 9 of the present invention is used for the card connector, the position of the lock pin 20 in the pin engagement recess 27 of the heart-shaped cam portion 18 accommodated in the card lock state is always fixed. position. In other words, since the recessed hole 31 is formed in the pin engagement recessed portion 27 of the heart-shaped cam portion 18 at the position of the card lock state, the distal end engagement portion 30 of the lock pin 20 is housed in the recessed hole 31.

Although the semicircular recessed portion 31a is formed as an inclined surface, the present invention is not limited thereto, and the pin engagement recessed portion 27 may be formed into a right-angled surface or an arcuate surface, and the distal end engaging portion 30 may be engaged with the pin. The contact point of the recessed portion 27 may be firmly contacted at the lower end portion of the pin engagement recessed portion 27.

[Embodiment 2] In the above embodiment, the distal end engaging portion 30 of the lock pin 20 and the pin engagement recess portion 27 of the heart-shaped cam portion 18 are formed as a vertical surface, but may be vertical as shown in FIG. In the wire, the distal end engaging portion 30 of the lock pin 20 and the pin engagement concave portion 27 of the heart-shaped cam portion 18 are slightly inclined at an angle θ toward the inner side, and a concave hole 31 is formed at the lower end portion of the inclined pin engagement recess portion 27. In the case where such a configuration is employed, the semicircular recess 31a can be removed, and only the semicircular hole portion 31b can be provided, and the semicircular recess portion 31a and the semicircular hole portion 31b can be simultaneously formed.

1‧‧‧ card connector
2‧‧‧ card insertion department
3‧‧‧ Shell
4‧‧‧Cars Department
5‧‧‧Ejector
6‧‧‧Extrusion spring
7‧‧‧heart cam
8‧‧‧ pin guiding slot
9‧‧‧heart cam lock
10‧‧‧ card connector
11‧‧‧ shell
12‧‧‧ mask cover
13‧‧‧Push down springs
14‧‧‧ card insertion port
15‧‧‧ card
16‧‧‧Card tray
18‧‧‧Heart-shaped cam
19‧‧‧Sliding groove
20‧‧‧Lock pin
21‧‧‧Extrusion spring
22‧‧‧ pin slider
23‧‧‧Spring compression member
24‧‧‧Kakahe slider
25‧‧‧Contacts
26‧‧‧Ejected leaf spring
27‧‧‧ Pins and recesses
28‧‧‧Swing shaft hole
29‧‧‧ base end shaft
30‧‧‧Top engagement
31‧‧‧ recessed hole
32‧‧ ‧ spring bearing
42‧‧‧Pushing spring
43‧‧‧Lock pin
45‧‧‧mask cover
50‧‧‧ going to the trough
51‧‧‧Return slot
53‧‧ ‧ round-trip sharing department
54‧‧‧Steps
55‧‧‧Reinforcement
56‧‧‧Clamping recess
57‧‧‧ Strengthening the Abutment

Fig. 1 shows a first embodiment of a heart-shaped cam lock device 9 of the present invention. Fig. 1(a) is a plan view in which the mask cover 12 is omitted, and Fig. 1(b) is a cross-sectional view taken along line A-A of Fig. 1(a). Fig. 2 (a) is a perspective view of the heart-shaped cam portion 18 of the heart cam lock device 9 of the present invention. 2(b)] is a developed cross-sectional view of the sliding groove portion 19 around the heart-shaped cam portion 18. Fig. 3 is a longitudinal sectional view showing a second embodiment of the heart-shaped cam lock device 9 of the present invention. Fig. 4 shows a card connector equipped with the heart cam lock device 9 of the present invention. FIG. 4( a )] is a plan view in which the mask cover 12 is omitted before the card 15 is pushed in. [Fig. 4 (b)] is a plan view of a main portion of Fig. 4 (a) after the card 15 is pushed. FIG. 5 is a plan view of a heart-shaped cam lock device of a conventional card connector 1. Fig. 6 (a) is a longitudinal sectional view showing the normal operation of the heart cam lock device of the conventional card connector 1. Fig. 6 (b) is a longitudinal sectional view showing a state in which the engaging pin portion 4 is lifted up. FIG. 7 is a perspective view of a conventional card connector 1.

9‧‧‧heart cam lock

12‧‧‧ mask cover

13‧‧‧Push down spring

18‧‧‧Heart-shaped cam

19‧‧‧Sliding groove

20‧‧‧Lock pin

22‧‧‧ pin slider

28‧‧‧Swing shaft hole

27‧‧‧ Pins and recesses

29‧‧‧ base end shaft

30‧‧‧Top engagement

31‧‧‧ recessed hole

31a‧‧‧ semicircular recess

31b‧‧‧ semicircular hole

Claims (4)

A heart-shaped cam locking device is formed with a sliding groove portion around the heart-shaped cam portion, and the top end engaging portion of the locking pin resists the extrusion spring when sliding, and slides on the outward side of the sliding groove portion, and the heart-shaped cam portion The pin engagement recess is engaged, resists the extrusion spring when being pushed out, is disengaged from the pin engagement recess, slides on the return side, and returns the top engagement portion to the original position by the extrusion spring, the heart cam lock device The lower end portion of the pin engagement recess is formed with a recessed hole that locks the lower end portion of the distal end engagement portion. The heart-shaped cam lock device according to claim 1, wherein the recessed hole is formed by a semicircular recess of a lower end wall surface of the pin engagement recess formed on a side where the lower end portion of the top end engaging portion contacts. Composition. The heart-shaped cam lock device according to claim 1, wherein the recessed hole is formed by a semicircular recess of a lower end wall surface of the pin engagement recess formed on a side where the lower end portion of the top end engaging portion contacts. And a semicircular hole portion that communicates from the semicircular recess to the lower portion. The heart-shaped cam lock device according to any one of claims 1 to 2, wherein the pin engagement recess portion and the top end engagement portion are inclined with respect to the lead, and the lower end portion is inclined to the inner side. The inclined lower end wall surface is formed with a recessed hole.