JP3464360B2 - Lock mechanism for rotating member - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a rotatable member which is rotatably connected to a main body and is detachable. For example, in an electric connection box or a connector which accommodates electric parts, one end is formed by a pin. The present invention relates to a lock mechanism such as an opening / closing lid rotatably connected to a main body.

[0002]

2. Description of the Related Art FIGS. 12 to 15 show a conventional example of a lock mechanism for an opening / closing lid 1. The opening / closing lid 1 is assembled to a case body 4 accommodating a crimping connection portion of the connection terminal 2 and the electric wire 3, and covers the upper surface and the side surface of the connection terminal 2 projecting from the case body 4 so as to be opened and closed. .

A pin 6 is attached to one end of the opening / closing lid 1, and the pin 6 is fitted to a bearing portion 7 having an arc-shaped cross section which is provided on the upper front portion of the case body 4. The case body 4 is rotatable about the pin 6
Connected to. When the opening / closing lid 1 is rotated about the pin 6 to a position that covers the upper surface and the side surface of the connection terminal 2,
It is fixed to the case body 4 by the lock mechanism 9.

The lock mechanism 9 includes stoppers 10 projecting from the left and right side walls 4a and 4b of the case body 4, engagement grooves 11 formed in the left and right side walls 1a and 1b of the opening / closing lid 1, respectively. Each of the left and right side walls 4a and 4b of the case body 4 includes a locking projection 12 formed to project.

Here, the stopper 10 contacts the lower end surfaces of the left and right side walls 1a and 1b of the opening / closing lid 1 when the opening / closing lid 1 is rotated to a position to cover the upper surface and the side surface of the connection terminal 2. It is a plate-like protrusion that regulates the rotation of the opening / closing lid 1 described above. Further, when the opening / closing lid 1 is rotated to a position that covers the upper surface and the side surface of the connection terminal 2, the left and right side walls 1a, 1 are formed.
The dimension b is set so as to overlap the left and right side walls 4a and 4b of the case body 4.

When the opening / closing lid 1 is rotated to a position covering the upper surface and the side surface of the connection terminal 2, the locking projection 12 is provided.
Rotation of the opening / closing lid 1 to the open side is regulated so that the opening / closing lid 1 is engaged with the engagement groove 11 and the opening / closing lid 1 is not opened accidentally.
The opening / closing lid 1 and the engaging grooves 11 and the locking projections 12 on the left and right side walls of the case body 4 are provided symmetrically, and as shown in FIG. 16, the opening / closing lid 1 is moved in the arrow (a) direction. As it is rotated, as shown in FIG. 17, the lower end surfaces of the left and right side walls 1a, 1b of the opening / closing lid 1 come into contact with the locking protrusions 12 on the left and right side walls 4a, 4b, respectively, at a point of some rotation. Then, when the opening / closing lid 1 is further rotated in the same direction, the lower ends of the left and right side walls 1a and 1b open outward due to elastic deformation, so that the locking projections 12 pass over the edges of the left and right side walls 1a and 1b. , As shown in FIG.
Is engaged with the engaging groove 11. Then, when the locking projection 12 is engaged with the engagement groove 11, at the same time, the left and right side walls 1
The lower end surfaces of a and 1b come into contact with the stopper 10, and the opening / closing lid 1
Is fixed to the case body 4.

[0007]

However, in the case of the lock mechanism 9 described above, since the engaging groove 11 and the engaging projection 12 are symmetrically provided, the engaging groove 11 is provided between the left side walls 1a and 4a. The engagement groove 11 and the engagement protrusion 12 are engaged between the right side walls 1b and 4b at the timing when the engagement protrusion 12 and the engagement protrusion 12 start engagement (that is, the timing when the left side wall 1a of the opening / closing lid 1 starts elastic deformation). The timing to start the match is the same. Therefore, a large force that elastically deforms the left and right side walls 1a and 1b of the opening / closing lid 1 at the same time is required as an operating force during the locking operation for fixing the opening / closing lid 1 to the case body 4, which causes a problem of poor operability. .

Further, in the above-mentioned lock mechanism 9, as a method of reducing the operating force at the time of the lock operation, the protrusion amount of the locking projection 12 is reduced or the left and right side walls 1 are used.
There is also a method of increasing the flexibility of a and 1b. According to such a method, the operating force at the time of locking operation can be reduced,
At the same time, the coupling force due to the engagement between the engagement groove 11 and the engagement projection 12 becomes weaker, which causes a new problem that the lock is easily released.

Therefore, an object of the present invention is to solve the above-mentioned problems, and since the operating force at the time of lock operation is small, the operability is good, and moreover, when releasing the lock, a larger force than that at the time of the lock operation is required. Then, it is an object of the present invention to provide a locking mechanism of a rotating member that can obtain a strong locked state in which the lock is not accidentally released.

[0010]

A locking mechanism for a rotating member according to the present invention comprises a rotating member having a pin serving as an axis for a rotatable connection with a main body, and both ends of the rotating member have a side wall. And a locking means that is provided on each of the left and right side walls of the main body and is engageable with the engaging portion. A locking mechanism for a moving member, wherein one of the engaging portion and the locking means is a protrusion projecting toward a side wall of an opposing partner, and the other is a recess into which the protrusion is engageable, When the engagement start timing between the engagement portion and the locking means is
It is characterized in that the rotating member and the main body are displaced from each other on the left side wall side and the right side wall side. Further, regarding the above-mentioned configuration, the equipment positions of the engaging portion and the engaging means are asymmetrical so that the engagement completion timings of the engaging portion and the engaging means coincide with each other on the left side wall and the right side wall. Can be configured.

Further, according to the above construction, the engagement start timing of the engagement portion and the locking means at the time of the lock operation is temporally shifted between the left side wall side and the right side wall side of the rotating member and the main body. Therefore, the operating force may be a force that elastically deforms one of the left and right side walls, and the operating force during the lock operation may be small. Moreover, since the engagement completion timings of the engaging portion and the locking means are matched with each other on the left side wall and the right side wall, a large force for elastically deforming both the left and right side walls at the same time is required for unlocking. It will be necessary and the lock will not accidentally come off.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the illustrated embodiments. 1 to 4 show an embodiment of a lock mechanism for a rotating member according to the present invention. FIG. 1 is an exploded perspective view of an opening / closing lid 21 and a case body 22 that employ the lock mechanism 20 of the embodiment. 2, FIG. 2 is a view of the case main body 22 of FIG. 1 as viewed in the direction of arrow D, FIG. 3 is a view of FIG. 2 as viewed in the direction of arrow E, and FIG. 4 is a view of FIG. 2 as viewed in the direction of arrow F.

The lock mechanism 20 of this embodiment is a mechanism for fixing the opening / closing lid 21 which is a rotating member at a position rotated by a predetermined angle. The opening / closing lid 21 includes a connection terminal 2 and an electric wire 3.
It is assembled to the case main body 22 accommodating the crimping connection portion with and to openably and closably cover the upper surface and the side surface of the connection terminal 2 protruding from the case main body 22.

The opening / closing lid 21 has a pin 6 assembled on one end side, and by fitting the pin 6 into a bearing portion 7 having an arc-shaped cross section, which is mounted on the upper front portion of the case main body 22, The pin 6 is rotatably connected to the case main body 22. When the open / close lid 21 is rotated about the pin 6 to a position where the upper surface and the side surface of the connection terminal 2 are covered, the case body 22 is rotated by the lock mechanism 20 of the present invention.
Fixed to.

The lock mechanism 20 includes the case body 2
Stoppers 10 provided on the left and right side walls 22a and 22b
An engaging groove 24, 25 formed as an engaging portion on each of the left and right side walls 21a, 21b of the opening / closing lid 21, and a protrusion formed on each of the left and right side walls 22a, 22b of the case body 22 as a locking means. Locking projections 27, 28.

Here, the stopper 10 comes into contact with the lower end surfaces of the left and right side walls 21a and 21b of the opening / closing lid 21 when the opening / closing lid 21 is rotated to a position covering the upper surface and the side surface of the connection terminal 2. It is a plate-like protrusion that regulates the rotation of the opening / closing lid 21. Further, the opening / closing lid 21 is provided with the connection terminal 2
When the upper and side surfaces of the case body 22 are rotated, the left and right side walls 21a and 21b are moved to the left and right side walls 2 of the case body 22.
The dimensions are set so as to overlap on the 2a and 22b.

The locking projections 27, 28 are provided on the opening / closing lid 2
The open side of the opening / closing lid 21 is engaged so that the opening / closing lid 21 does not inadvertently open by engaging with the engaging grooves 24 and 25 when 1 rotates to a position covering the upper surface and the side surface of the connection terminal 2. To turn to.

In the case of this embodiment, the engagement start timing between the engaging grooves 24, 25 and the locking projections 27, 28 on the left and right side walls of the opening / closing lid 21 and the case body 22 is the left side wall. Side and the right side wall side are displaced from each other, and further, the engagement grooves 24 and 25 and the locking protrusions 27 and 28 are
The engagement grooves 24, 25 and the locking projection 2 are arranged so that the engagement completion timings of the engagement with the left side wall and the right side wall coincide with each other.
The equipment positions of 7, 28 are set asymmetrically.

According to the lock mechanism 20 described above, when the opening / closing lid 21 is rotated in the arrow (c) direction to start the locking operation as shown in FIG. 5, the opening / closing operation is performed as shown in FIGS. 6 and 7. The lower end of the left side wall 21a of the lid 21 abuts on a locking projection 27 provided near the upper end of the left side wall 22a of the case body 22. At this time, as also shown in FIG. 6, the locking projection 28 provided at a position apart from the upper end of the right side wall 22b of the case body 22 is separated from the lower end surface of the opening / closing lid 21. Then, when the opening / closing lid 21 is further rotated to the stopper 10 side from the state shown in FIGS. 6 and 7, the left side wall 21a of the opening / closing lid 21 is elastically deformed outward, and the locking projection 2
7, the engagement operation of the engagement groove 7 with the engagement groove 7 is started. At this time,
The right side wall 21b of the opening / closing lid 21 is not elastically deformed.

Then, as shown in FIGS. 8 and 9, until the lower end surface of the right side wall 21b of the opening / closing lid 21 abuts on the locking projection 28 of the right side wall 22b of the case body 22, the opening / closing lid 21 is placed on the stopper 10 side. When it is turned to, the engaging operation between the engaging groove 25 and the locking projection 28 starts. Then, when further rotated in the direction of the arrow (d) from the state shown in FIGS. 8 and 9, the left side wall 21a of the opening / closing lid 21 is elastically deformed to the outside, as shown in FIGS. Then, the respective locking projections 27 and 28 are engaged with the corresponding engaging grooves 24 and 25, and the locking operation is completed. In addition,
When the locking operation shown in FIGS. 10 and 11 is completed, the stoppers 10 provided on the left and right side walls 22a and 22b of the case body 22 are attached to the left and right side walls 2 of the opening / closing lid 21.
The lower end surfaces of 1a and 21b are in contact with each other.

As described above, according to the lock mechanism 20 of the embodiment, the engagement groove 2 at the time of the lock operation is performed.
4, 5 and the engaging projections 27, 28 start to be engaged with each other on the left side wall side and the right side wall side of the opening / closing lid 21 and the case main body 22 with respect to time, so that the operation force is either left or right. A force of a size that elastically deforms the side wall of the device is sufficient, and the operation force at the time of the lock operation is small, so that the operability is improved. Moreover, the engagement grooves 24, 25 and the locking projections 27, 2
Since the timing of completion of engagement with 8 is the same on the left side wall side and the right side wall side, the opening / closing lid 21 is used for unlocking.
It is necessary to make the left and right side walls 21a and 21b elastically deform at the same time, and it is possible to obtain a strong locked state in which the lock is not accidentally released.

In the case of the above-described embodiment, the left and right side walls 21a and 21b of the opening / closing lid 21 are provided with engaging grooves 24 and 25, and the left and right side walls 22a and 22b of the case body 22 are provided with locking projections 27 and 28. However, the locking projections 27 and 28 may be provided on the opening / closing lid 21 side, and the engagement grooves 24 and 25 may be provided on the case body 22 side instead. Further, although the engaging groove is formed in a linear shape in the drawing, it may be formed in an arc shape according to the movement of the locking projection.

[0023]

According to the locking mechanism of the rotating member of the present invention, the engagement start timing of the engaging portion and the locking means at the time of the locking operation is determined by the left side wall and the right side wall of the rotating member and the main body. Since there is a time lag between the above and the other, the operating force is sufficient to elastically deform either the left or right side wall, and the operating force at the time of the lock operation is small, so that the operability is improved. Moreover, since the engagement completion timings of the engaging portion and the locking means are matched with each other on the left side wall and the right side wall, a large force for elastically deforming both the left and right side walls at the same time is required for unlocking. It becomes necessary to obtain a strong locked state in which the lock is not accidentally released.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an opening / closing lid and a case body to which an embodiment of a rotating member locking mechanism according to the present invention is applied.

FIG. 2 is a view of the case body of FIG.

FIG. 3 is a view on arrow E of FIG.

FIG. 4 is a view on arrow F of FIG.

FIG. 5 is a side view showing an operation at the time of starting a locking operation between the opening / closing lid to which the locking mechanism according to the embodiment of the present invention is applied and the case body.

FIG. 6 is a right side view showing the engagement start timing of the engaging portion and the locking means on the left wall side between the case lid and the opening / closing lid to which the lock mechanism according to the embodiment of the present invention is applied. Is.

FIG. 7 is a left side view showing the engagement start timing of the engagement portion and the locking means on the left wall side between the opening / closing lid to which the lock mechanism according to the embodiment of the present invention is applied and the case body. Is.

FIG. 8 is a right side view showing the engagement start timing between the engagement portion and the locking means on the right wall side between the opening / closing lid to which the lock mechanism according to the embodiment of the present invention is applied and the case body. Is.

FIG. 9 is a left side view showing the engagement start timing between the engagement portion and the locking means on the right wall side between the opening / closing lid to which the lock mechanism according to the embodiment of the present invention is applied and the case body. Is.

FIG. 10 is a right side view showing a state where the lock operation is completed between the opening / closing lid to which the lock mechanism according to the embodiment of the present invention is applied and the case body.

FIG. 11 is a left side view showing a state where the lock operation is completed between the opening / closing lid to which the lock mechanism according to the embodiment of the present invention is applied and the case body.

FIG. 12 is an exploded perspective view of an opening / closing lid and a case body adopting a conventional lock mechanism.

13 is a view of the case main body shown in FIG. 12 as viewed from the direction of arrow A. FIG.

FIG. 14 is a view on arrow B of FIG.

FIG. 15 is a view on arrow C of FIG.

16 is a side view showing an operation at the start of a locking operation of the opening / closing lid shown in FIG.

17 is a side view showing a state at the start of engagement of the lock mechanism after the locking operation of the opening / closing lid shown in FIG. 12 is started.

FIG. 18 is a side view showing a lock completed state of a conventional rotating member locking mechanism.

[Explanation of symbols]

6 pin 20 Lock mechanism 21 Open / close lid (rotating member) 21a, 21b Left and right side walls 22 Case body (body) 22a, 22b left and right side walls 24, 25 Engagement groove (engagement part) 27, 28 Locking protrusion (locking means)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16B 1/00-1/04 E05C 21/00-21/02 H05K 5/00-5/06 F16C 11 / 00-11/12

Claims (2)

(57) [Claims] 1. A rotating member having a shaft for pivotally connecting to a main body, an engaging portion provided on each side wall of the rotating member where both ends of the shaft are located, and each of left and right side walls of the main body. A locking mechanism for a rotating member that restricts a rotating operation of the rotating member with respect to the main body by a locking means that is engaged with the engaging portion, the locking mechanism comprising: One of the protrusions is a protrusion protruding toward the side wall of the opposite partner, and the other is a recess into which the protrusion can be engaged. The engagement start timing of the engaging portion and the locking means is the rotation member. And a locking mechanism for a rotating member, wherein the left side wall and the right side wall of the main body are displaced from each other. 2. The equipment positions of the engaging portion and the engaging means are asymmetrical so that the engagement completion timings of the engaging portion and the engaging means coincide with each other on the left side wall side and the right side wall side. The lock mechanism for the rotating member according to claim 1, wherein the lock mechanism is set.