JPH069278Y2 - Push-open type door lock mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a door open / close mechanism for a small container box, and more particularly to a push-open type door lock mechanism for a box which is suitable for being installed inside a vehicle.

[Conventional technology]

The conventional push-open type door lock mechanism is shown in Figs.
Since the figure is the same except that the projection 31 is not provided, its outline will be described below with reference to the figure. An arm 13 extends to a door 1 which is rotatably supported by a shaft 6 along the lower edge of the opening of the box 5 and is urged toward the open side by a spring 8.
An engagement pin 14 provided at the tip of the engagement with the locking cam 3. The cam 3 loosely fitted to the shaft 9 below the support 4 fixed to the box 5 is biased in the counterclockwise direction D by the spring 7, and is in the position shown in FIG. 3 (a) when the door 1 is closed. As shown in FIG. 3 (b), when the door 1 is pushed in the direction of arrow C, the cam 3 rotates in the direction D, and the engagement pin 14 is inclined so as to be shallower upward. (See Fig. 4). When the hand is released after pushing, the engagement pin 1
4 rises along the groove 32 and comes to the position shown in FIG. 3 (c). At this time, the cam 3 tilts as shown in FIG. 4 or moves laterally to the support 4 side. When the door 1 is further opened, the engagement pin 14 further rotates together with the arm 13 with the rotation of the cam 3 stopped in the D direction. It reaches the end of 32 and comes out of this groove 32, and further away from the cam 3. When the door 1 is closed from this open state, the engagement pin 14 moves to the third position.
It descends downward in the figure and contacts the upper curve in FIG. 3, which is the contour line of the cam 3. When the door 1 is further pushed in the closing direction, the engagement pin 14 pushes the cam 3 to rotate the cam 3 in the clockwise direction (the direction opposite to the D direction), and the hook shown in the drawing from the bottom of the upper curve. Enter the inside of the shape part, the third
It reaches the position when the door is closed in FIG.

[Problems to be solved by the invention]

The engagement allowance between the engagement pin 14 and the cam 3 is such that when the lock is opened, the tip of the engagement pin enters into the groove 32 of the cam 3, so that the tip of the engagement pin 14 does not protrude from the cam 3 toward the support 4 side. And the cam 3 moves relative to the door 1,
It is structured so that it can be tilted. When an inertial force acts in all directions due to motion or vibration as in an automobile, the contact pressure between the engagement pin 14 and the cam 3 is weakened by the longitudinal inertial force, and the lateral inertial force causes the cam 3 to tilt and the engagement pin 14 There is a risk that the lock will be released and the door will open abruptly, so that the engagement pin 14 can be removed by increasing the set load of the spring 7 provided on the shaft 9 in the related art. Had been prevented. However, it is necessary to increase the set load of the spring 7 in order to prevent the lock from being disengaged even if inertial force in any direction is applied. However, if this spring 7 is strengthened, a strong door push force for opening and closing the door 1 is obtained. There was a problem of being needed.

The object of the present invention is to limit the relative lateral movement of the cam 3 and the door 1 when the door is closed to be less than the engagement allowance of the cam 3 and the engaging pin 14 so as to mechanically surely prevent the door from being opened due to inertial force and to be light. It is to provide a push-open type door lock mechanism that can be opened and closed by force.

[Means for solving problems and actions]

Paying attention to the fact that the cam position when the door is pushed to open the lock and the cam position when the door is closed change, the inclination and lateral movement of the cam 3 are kept within the engagement allowance of the engagement pin 14 and the cam 3 only when the door is closed. Although limited, it is sufficient to provide a device that does not limit the inclination and lateral movement of the cam 3 at the cam position when the door is pushed.
That is, a protrusion is provided on one of the surfaces of the cam and the support that face each other, and the tip of this protrusion approaches the other surface when the door is closed to restrict the inclination or lateral movement of the cam. When pushing and opening the door,
The cam is allowed to tilt or move laterally away from the other surface.

〔Example〕

1 to 3 show the push-open type door lock mechanism of the first embodiment, in which the support 4 for holding the shaft 9 supporting the cam 3 is provided with a step 42, and the height of the step 42 is increased. The height h (the height difference between the tip end side and the base end side) is larger than the dimension of the engagement allowance 2 (see FIGS. 2 and 4) between the cam 3 and the engagement pin 14. That is, the base end side (fourth
The lower side in the figure projects toward the cam 3 and is substantially parallel to the side surface of the cam 3. Further, a protrusion 31 is provided on the surface of the cam 3 facing the support 4. This protrusion 31
The height of the step 42 from the surface facing the support 4 of the cam 3 is
It is set to be almost equal to the distance to the base end side of
This prevents the surface of the cam 3 facing the arm 13 when the door is closed from being positioned closer to the support 4 than the tip of the engaging pin 14. Further, the position of the protrusion 31 on the cam 3 faces the base end side of the step 42 when the door is closed as shown in FIG. 3A, and the step 4 when the door is pushed as shown in FIG. 3B.
2. A position that faces the tip side of the cam 2, that is, the cam 3
Set it to a position where the inclination of is allowed. The operation of this embodiment is such that the cam 3 is provided with the projection 3 when the door is closed as shown in FIG. 3 (a).
The gap between the base 1 and the step 42 of the support 4 is very small,
Since the inclination or the lateral movement of the cam 3 is stopped, the engagement pin cannot be disengaged even when the lateral inertia force acts. 3 (b) to (c),
The protrusion 3 provided during the push and open operations shown in FIG.
Since 1 is located on the tip end side of the step 42, tilting or lateral movement is allowed, and the cam 3 moves upward in the groove 32 and the engaging pin 1
It is pushed laterally by 4 and tilts or moves laterally.
As a result, the engagement pin 14 separates from the cam 3 and unlocks, and the door 1 opens.

The second embodiment shown in FIGS. 7 (a) to 7 (c) is one in which a hole 42 'is provided instead of providing the step 42 in the support 4.
When the door is closed (a), the protrusion 31 is located outside the hole 42 ', and the surface of the cam 3 facing the arm 13 has the engagement pin 31.
It prevents it from being located on the support 4 side from the tip of. When the door is pushed (b), the protrusion 31 is located in the hole 42 ', and the cam 3 can be tilted and moved laterally.

In the third embodiment shown in FIGS. 5 (a) to 5 (c) and FIG. 6, the projection 41 is on the support 4 side, and the cam 3 is at the time of pushing the door (state of FIG. 5 (b)). It is provided so as not to overlap with the cam 3 when the door is closed (state of FIG. 5 (a)), and its height is such that the surface not facing the support 4 side of the cam 3 is higher than the tip of the engaging pin 14. It is set to a length that prevents it from being located on the support 4 side. In this embodiment as well, the engagement pin 14 and the cam 3 are prevented from being disengaged from each other by the projection 41 when the door is closed, as in the case of the previous embodiment.

〔effect〕

In this invention, a protrusion is provided on one of the surfaces of the cam and the support that face each other, and the tip of the protrusion is
When the door is closed, the inclination of the cam is regulated close to the other surface, and when the door is pushed and the door is opened, the inclination of the cam is allowed to separate from the other surface to allow the inclination of the cam. It is possible to prevent the door from being opened unexpectedly by the inertial force in the push-open type door lock mechanism of the door of the accessory case provided in the automobile in which the inertial force acts in all directions.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention, and FIG. 2 is a view on arrow A of FIG. Figure 3 (a) ~ (c)
Is an operation explanatory view of the first embodiment, (a) is when the door is closed,
(B) shows the state when the door is pushed, and (c) shows the state during the opening operation after the door push. FIG. 4 is a sectional view taken along line BB in FIG. 3 (c). 7 (a) and 7 (b) are side views showing the main part of the second embodiment, (a) showing the closed state and (b) showing the door pushed state. 5 (a) to 5 (c) are explanatory views of the operation of the main part of the third embodiment, where (a) is the door closed, (b) is the door push, and (c) is the door push after opening operation. Indicates the time. Sixth
The drawing is a sectional view taken along the line B'-B 'of FIG. 5 (c). 1 ... Door 13 ... Arm 14 ... Engagement pin 2 ... Engagement allowance 3 ... Cam 31 ... Protrusion 32 ... Groove 4 ... Support 41 ... Protrusion 42 ... Step 42 '... Hole 5 ... … Box 6 …… Axis 7 …… Spring 8 …… Spring 9 …… Axis

Claims (1)

[Scope of utility model registration request] 1. A door 1 is urged by a spring 8 in an opening direction to be rotatably attached to a box 5, and an engagement pin 14 at an end of an arm 13 extending from the door 1 is engaged with a cam 3. In the push-open type door mechanism that is opened and closed to open and close the door 1, (a) the cam 3 is provided with the projection 31 and the support 4 is provided with the step 42 or the hole 42 ', or (a).
A protrusion 41 is provided on the support 4, and in the case of (a), the protrusion 31
The gap between the support 4 and the support 4, in the case of (a), the gap between the protrusion 41 and the cam 3 is small at the cam 3 turning position when the door 1 is closed, and at the cam 3 turning position when the door 1 is pushed. A push-open type door lock mechanism that is enlarged to a size that exceeds the engagement allowance between the engagement pin 14 and the cam 3.