JPH08177291A - Cover lock mechanism - Google Patents

Abstract

PURPOSE: To provide a specified torque to a cover supporter which supports a cover frame when holding the cover frame which is in an opened state with a main body frame or when opening the cover frame. CONSTITUTION: In case when holding a cover frame 1 in an opened state with a main body frame 2, a lock pin 4 installed to the cover frame 1, is fitted in a lock hole 6c of a cover supporter 6. A support pin 5, which is the rotary center of the cover supporter 6, is located at a lateral end of guide hole 6b of a long hole 6a while a blade spring member 8 is designed to provided an energizing force to a projected part 7 so that the cover supporter 6 may be rotated clockwise. On one hand, when closing the cover frame 1, the cover frame 1 is further rotated clockwise from the opened state. When the support pin 5 moves to the end on the outer peripheral side, the cover supporter 6 is rotated counterclockwise by the energizing force of the blade spring 8 so that the lock pin 4 may be disengaged from the lock hole 6c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for assisting the operation of a cover body when opening and closing the cover body with respect to a main body.

[0002]

2. Description of the Related Art FIG. 7 is a side view showing an engagement relationship between a cover frame and a body frame using a conventional lock mechanism. The main body frame 31 is provided with a rotation shaft 33 that rotatably supports the cover frame 32 and a support portion 36 that rotatably supports the cover supporter 34. The cover frame 32 is provided with a protruding pin 35. In addition, the cover supporter 34 includes the protruding pin 3
A lock hole 34a into which the 5 is fitted, a support hole 34b into which the support portion 36 is inserted, and a guide hole 34c into which the protrusion 35 can slide are provided. The lock hole 3
4a and the guide hole 34c are connected by a connecting hole 34d having a width narrower than the outer diameter of the protruding pin 35.

When the operator opens the cover frame 32 (shown by the chain double-dashed line in FIG. 7) closed with respect to the main body frame 31, the cover frame 32 is rotated clockwise about the rotary shaft 33. Let At this time, the projecting pin 35 slides in the guide hole 34c, and the cover supporter 34 starts rotating counterclockwise around the support portion 36.

The cover frame 32 rotates as described above, and the projecting pin 35 is engaged with the lock hole 3 of the guide hole 34c.
Upon contact with the end on the 4a side, the operator further rotates the cover frame 32 in the clockwise direction about the rotation shaft 33. As a result, the cover supporter 34 near the connecting hole 34c is elastically deformed, and the width of the connecting hole 34c is expanded. The protruding pin 35 is connected to the connecting hole 34c.
The cover frame 32 is inserted into the lock hole 34a through the space between the cover frame 32 and the cover frame 32, and is held in an open state with respect to the main body frame 31.

When the cover frame 32 is closed, the operator applies an urging force counterclockwise in FIG. 7 to the cover frame 32 so that the protruding pin 35 comes out of the lock hole 34a. At this time, the width of the connecting hole 34d is expanded by the same action as described above, and the protruding pin 35 is formed.
Is released from the lock hole 34a, the cover frame 3
7 rotates in the counterclockwise direction in FIG. 7 due to its own weight and is closed with respect to the main body frame 31.

FIG. 8 is a side view showing an engagement relationship between a cover frame and a main body frame using another conventional lock mechanism. When the cover frame 32 is held in the open state by the lock mechanism of FIG. 8, the cover frame 32 and the cover frame 32 are held in the same manner as the lock mechanism of FIG.
The projecting portion 35 provided at is rotated clockwise in FIG. The cover supporter 37 rotatably supported by the support portion 36 of the main body frame 31 starts rotating counterclockwise in FIG. 8 because the guide hole 37c is engaged with the protrusion 35.

As in the case of FIG. 7, the cover supporter 37 is provided with a lock hole 37a, and the guide hole 37 is formed in an L shape with respect to the guide hole 37c.
It is formed integrally with a. Protruding pin 3 as above
5, the protrusion pin 35 and the guide hole 37c are rotated.
When the cover supporter 37 rotates counterclockwise in FIG. 8 to a position where the cover supporter 37 engages with the end of the lock hole 37a, the cover supporter 37 rotates clockwise in FIG. 8 due to its own weight. As a result, the protruding pin 35 is fitted into the lock hole 37a, and the cover frame 32 is held in an open state with respect to the main body frame 31.

When the cover frame 32 is closed, the operator supports the cover frame 32 with one hand so that the projecting pin 35 comes out of the lock hole 34a, and the operator supports the cover supporter 37 with the other hand. A counterclockwise biasing force in FIG. 8 is once applied. As a result, the protruding pin 35 is disengaged from the lock hole 34a, and the cover frame 32 is rotated counterclockwise in FIG. 8 by its own weight. Then, the cover frame 32 is closed with respect to the main body frame 31.

[0009]

However, when the open state of the cover frame 32 is held or released by the cover supporter 34 of FIG. 7, the guide hole 34c is moved toward the lock hole 34a. Alternatively, it must be forcibly moved in the opposite direction. Therefore, when the above operation is repeated, the connecting hole 34
At the portion of d, the elastic force of the cover supporter 34 is depressed, and it becomes impossible to hold the cover frame 32 in the open state.

When the cover frame 32 held in the open state by the cover supporter 37 of FIG. 8 is closed, the operator supports the cover frame 32 with one hand,
With the other hand, once move the cover supporter 37 to the position shown in FIG.
An operation of applying a counterclockwise biasing force must be performed. Therefore, there is a problem that the operability of the cover frame 32 becomes complicated.

[0011]

In order to solve the above problems, the invention of claim 1 provides a cover body which can be opened and closed with respect to the main body, and a cover-side engaging member between the cover body and the main body. It comprises a rod member which is installed via a stop pin and a main body side support pin, and in the rod member, a locking hole for slidably and slidably accommodating the locking pin and the support pin can be slid. And an elastic member for changing the urging direction to the rod member depending on the positional relationship between the support pin and the elongated hole.

According to a second aspect of the present invention, the rod member includes:
A pressing portion that is pressed by the elastic member when the cover is opened and closed is provided, and the pressing portion is provided on the outer wall of the rod member at a substantially central portion of the elongated hole.

According to a third aspect of the present invention, the elastic member is
The feature is that it is a leaf spring attached to the body side.

[0014]

As described above, according to the first aspect of the invention, when the operator opens the cover body, the elastic member causes the rod member to act as the locking pin depending on the positional relationship between the elongated hole and the support pin. Energize in the direction of locking the locking hole. Further, when the cover body is closed, by further moving the cover body in the open state, the positional relationship between the elongated hole and the support pin is changed from the above case, and the elastic member is locked with the locking pin. The rod member is urged in a direction to release the locked state with the hole.

According to the second aspect of the present invention, the pressing portion is provided on the side wall of the elongated hole of the rod member at the substantially central portion thereof.
When the support pin is located at one end of the elongated hole, the pressing member is urged by the elastic member in the direction of locking the locking pin and the locking hole. Further, when the support pin is located at the end opposite to the above, the pressing portion is urged by the elastic member in the direction of releasing the locked state between the locking pin and the locking hole.

According to the third aspect of the invention, the elastic member is the leaf spring attached to the main body side, so that the biasing direction depends on the positional relationship between the elongated hole of the rod member and the support pin. The structure for changing is simple.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a partial perspective view showing the configuration of an embodiment cover lock mechanism of the present invention, and FIGS. 2 to 6 are partial side views showing the movement of the embodiment cover lock mechanism. The cover frame 1 is
It is rotatably supported by a shaft portion 3 provided in the main body frame 2. The cover frame 1 has a locking pin 4
Is provided, and the support pin 5 is provided on the main body frame 2. A cover supporter 6 as a rod member is provided between the locking pin 4 and the support pin 5.

The cover supporter 6 is provided with a long hole 6a, and the support pin 5 is inserted into the long hole 6a. As a result, the cover supporter 6 has the support pin 5
On the other hand, it can rotate and slide along the longitudinal direction of the long hole 6a. Further, the cover supporter 6 is provided with a guide hole 6b along the longitudinal direction thereof.
A lock hole 6c is connected to one end of the b on the opposite side of the elongated hole 6a. The lock hole 6c is the guide hole 6 described above.
It is provided on the left side in FIG. 1 so as to be L-shaped with respect to b. When the cover frame 1 is opened and closed with respect to the main body frame 2, the locking pin 4 moves along the guide hole 6b, and the cover frame 1 with respect to the main body frame 2 is moved.
When it is held in the opened state, it is fitted into the lock hole 6c.

Further, the cover supporter 6 has the elongated hole 6
A protrusion 7 is provided on the side wall near the center of a. The main body frame 2 is provided with a leaf spring 8 for applying a biasing force to the projecting portion 7 when the cover frame 1 is opened and closed.

When opening the cover frame 1 which is closed with respect to the main body frame 2 as shown in FIG. 2, the operator rotates the cover frame 1 in the clockwise direction in FIG. At this time, the locking pin 4 provided on the cover frame 1 also has the shaft portion 3
It rotates in the clockwise direction in FIG. As a result, the locking pin 4 moves within the guide hole 6b, and the cover supporter 6 moves around the support pin 5 as shown in FIG.
It rotates counterclockwise (see Fig. 3).

At this time, the support pin 5 is located at the end of the elongated hole 6a on the guide hole 6b side, and the support pin 5 is located above the projecting portion 7 in FIG. When the leaf spring 8 presses the projecting portion 7 in this state, the cover supporter 6
A biasing force in the clockwise direction in FIG.

With the rotation of the cover frame 1, the locking pin 4 moves to the connecting portion between the guide hole 6b and the lock hole 6c. Then, as described above, the spring member 8
Due to the biasing force applied to the cover supporter 6 by the above, the locking pin 4 is disengaged from the guide hole 6b and fitted into the lock hole 6c. As a result, the cover frame 1 is held in an open state with respect to the main body frame 2 (see FIG. 4).

When closing the cover frame 1 which is held in the opened state with respect to the main body frame 2 as shown in FIG. 4, the operator further rotates the cover frame 1 in the clockwise direction in FIG. With the rotation of the cover frame 1, the locking pin 4 also rotates clockwise in FIG. 4, and the locking pin 4 contacts the upper end of the lock hole 6c in FIG. When the cover frame 1 is further rotated clockwise in FIG. 4 with the locking pin 4 and the upper end portion of the lock hole 6c in FIG. 4 abutting, the support pin 5 and the elongated hole 6a in FIG. The cover supporter 6 is pulled upward and rightward in FIG. 4 by the locking pin 4 until it comes into contact with the middle lower end (see FIG. 5).

As described above, the support pin 5 and the long hole 6 are provided.
When the lower end portion of a in FIG. 4 comes into contact, the protrusion 7 is located above the support pin 5 in FIG. When the leaf spring 8 presses the projecting portion 7 in this state, a counterclockwise rotational force in FIG. 5 acts on the cover supporter 6 about the support pin 5. Due to this rotational force, the locking pin 4 is disengaged from the lock hole 6c and moved to the upper end portion on the guide hole 6b side (see FIG. 6).

When an operator rotates the cover frame 1 counterclockwise in FIG. 6 in this state, the locking pin 4 separates from the upper end of the guide hole 6b in FIG. 6 and extends along the guide hole 6b. Moving. When the locking pin 4 and the upper end portion of the guide hole 6b in FIG. 6 are separated, the cover supporter 6 is held by its own weight until the support pin 5 and the end portion of the elongated hole 6a on the guide hole 6b side contact. It descends to the lower left in Fig. 6 (Fig. 3
reference). Then, the cover frame 1 returns to the closed state with respect to the main body frame 2 as shown in FIG.

[0026]

As described above, according to the present invention, by rotating the cover body with respect to the main body in the opening or closing direction, the elastic member is fitted in the locking pin and the locking hole, or The cover supporter is rotated in the direction of removing the locking pin from the lock hole. by this,
The operability of opening and closing the cover frame becomes smooth.

[Brief description of drawings]

FIG. 1 is a partial perspective view showing the configuration of a cover lock mechanism according to an embodiment of the present invention.

FIG. 2 is a side view of the embodiment cover lock mechanism of the present invention when the cover frame is closed with respect to the main body frame.

FIG. 3 is a side view of the cover lock mechanism of the embodiment of the present invention when the cover frame is opened from the state of FIG.

FIG. 4 is a side view of the cover lock mechanism according to the embodiment of the present invention when the cover frame is held open with respect to the main body frame.

5 is a side view of the cover lock mechanism according to the embodiment of the present invention when the cover frame further rotates clockwise from the state of FIG. 4. FIG.

6 is a side view of the embodiment cover lock mechanism of the present invention when the locking pin moves to the guide hole side from the state of FIG. 5. FIG.

FIG. 7 is a partial side view showing the configuration of a conventional cover lock mechanism.

FIG. 8 is a partial side view showing the configuration of another conventional cover lock mechanism.

[Explanation of symbols]

 1 Cover Frame 2 Body Frame 3 Shaft 4 Locking Pin 5 Support Pin 6 Cover Supporter 6a Long Hole 6b Guide Hole 6c Lock Hole 7 Projection 8 Leaf Spring

Claims (3)

[Claims] 1. A rod member which is openable and closable with respect to a main body, and a rod member which is provided between the cover member and the main body via a cover side locking pin and a main body side support pin. Is provided with a locking hole that slidably and lockably accommodates the locking pin and a long hole that slidably accommodates the support pin. Depending on the positional relationship between the support pin and the long hole, a rod member is provided. A cover lock mechanism comprising an elastic member that changes a biasing direction. 2. The rod member is provided with a pressing portion which is pressed by the elastic member when the cover is opened / closed, and the pressing portion is located at a substantially central portion of the elongated hole and is an outer wall of the rod member. The cover lock mechanism according to claim 1, wherein the cover lock mechanism is provided in the. 3. The cover lock mechanism according to claim 1, wherein the elastic member is a leaf spring attached to the main body side.