JPH0726531Y2 - Drawer latch mechanism - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer latch mechanism used in a drawer box, particularly a drawer box of a cash register or the like.

[0002]

2. Description of the Related Art Conventionally, a cash accounting recording unit of a cash register is of an extremely low power consumption type due to an improved electronic circuit. However, when the latch means for ensuring the efficient operation of the money storage drawer box is electrically driven, a large current is required and it is difficult to take advantage of the low power consumption type. As a means for solving this, Japanese Patent Publication No.
There is a drawer latch mechanism disclosed in Japanese Patent Publication No. 3. This technology is such that when the drawer is pushed into the money storage drawer box, the drawer is locked by the latch mechanism, and by pushing this drawer again, the latch lock unlocking mechanism provided in the latch mechanism operates and the drawer is pulled out by the spring means. Is automatically extruded. As shown in FIG. 15, the latch mechanism 30 of this drawer is
In order to prevent the drawer locking portion 13 from rotating in a direction opposite to the direction in which the drawer locking portion 13 resists the urging force of the first spring 11 and engages with the drawer engaging body, the latch locking portion 15 includes:
The rotation of the locking member 6 can be regulated by contacting the extension piece 50.
This allows the drawer to be engaged within the money storage drawer box. Then, by moving the release rod 17 rearward, the latch engaging portion 15 can be rotated rearward. As a result, the engagement of the drawer can be released. According to the drawer latch mechanism 30, the drawer can be engaged and disengaged only by the mechanical latch mechanism 30, the drawer operates smoothly with a slight pressing force, and no current or solenoid mechanism is required. Therefore, it can be provided at an extremely low cost.

[0003]

However, according to the above-mentioned latch mechanism, when the drawer is pushed into the money storage drawer box vigorously, the impact locks the drawer in the money storage drawer box. Sometimes, the drawer did not close.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drawer latch mechanism that can be opened and closed easily even when the drawer is pushed in forcefully.

[0005]

In order to achieve the above-mentioned object, the inventor of the present invention prevents the latch from rotating rearward from the rear end of the locking member due to the impact of closing the drawer. It was thought that this was effective, and as a result of intensive studies, the present invention was reached.

That is, according to the present invention, both sides are fixed to the rear of the drawer box so that both side surfaces thereof are oriented in a direction perpendicular to the front-rear direction which is the drawing direction of the drawer box, and the front end is provided at the rear end of the drawer. A support plate formed with an entrance portion through which the engaging body can enter and exit, and provided on one side surface of the support plate so as to be rotatable in a plane parallel to the side surface and movable for a predetermined distance in the front-rear direction, An engaging member formed at the front end portion with a drawer engaging portion that can engage with the engaging member when the engaging member of the drawer enters the entrance portion, and a rearward extending from the rear end portion of the engaging member. The extending piece provided, the locking portion provided at the rear end of the extending piece, and the locking member so as to always rotate in the direction in which the drawer locking portion engages with the engaging body. A biasing first spring and a surface parallel to the side surface of the support plate at the rear end of the support plate. A rotatably provided latch, a second spring that urges the latch to always abut the rear end of the locking member, and the other side surface of the support plate so that the latch can move in the front-rear direction. When it moves rearward due to the pressing of the engaging body that is provided and has deeply entered the entrance portion,
And a release member for pushing and rotating the latch rearward,
When the engaging body and the drawer locking portion are engaged, the drawer locking portion rotates in a direction opposite to the direction in which the drawer locking portion resists the urging force of the first spring and engages with the engaging body. So that the latch contacts the extension piece and restricts the rotation of the locking member, the locking portion and the latch engage with each other, and the latch moves to the second spring. By blocking the backward rotation against the biasing force and slightly pushing the drawer engaged in the drawer box, when the engaging body deeply enters the entrance portion, the locking member is By slightly rotating by the biasing force of the first spring, the engagement between the locking portion and the latch is released,
When the release member moves rearward and the latch is rotated rearward, the locking member is moved in the biasing direction of the first spring by the pressing force when the drawer is moved in the opening direction. It is characterized in that the engagement between the engagement body and the drawer locking portion can be released by rotating in the opposite direction.

[0007]

According to the drawer latching mechanism of the present invention, when the drawer locking portion provided on the locking member is engaged with the engaging portion of the drawer, the extension piece at the rear end of the locking member is provided. The engaging portion provided on the and the latch engage with each other. As a result, the latch is shocked when the drawer is pushed in forcefully,
It is possible to prevent the backward rotation against the biasing force of the second spring. Therefore, even when the drawer is pushed in vigorously, the drawer is securely locked in the money storage drawer box. Further, by pushing the drawer locked in the money storage drawer box slightly, and pivoting the latch backward via the release member, the drawer can be easily opened.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the latch means of the present invention will be described with reference to FIGS. The drawer 1 engaging body 2 provided to be openable and closable in the money storage drawer box 21 shown in FIG. 14 is engaged by the latch mechanism 3.
The latch mechanism 3 includes a plate member 4 and a support plate 6 which is upright at a substantially central portion of the plate member 4 and has a substantially square plate shape as a whole. The support plate 6 is fixed to the rear of the drawer 1 so that both side surfaces thereof face in a direction perpendicular to the front-rear direction which is the drawing direction of the drawer 1. Further, the support plate 6 is formed with an entrance portion 5 at the front end thereof into which the engaging body 2 provided in the drawer 1 can be inserted and withdrawn. Further, as shown in FIG. 1, a downward notch 7 is provided in the vicinity of the front end of the upper end surface of the support plate 6, and a portion 7a is provided in the vicinity of the rear of the upper end surface.

Reference numeral 8 denotes a locking member, which is loosely rotatably loosely attached to the upper part of one side surface of the support plate 6 in the vicinity of the entrance portion 5 by a rivet 10 through an oblong hole 9. The front end portion of the locking member 8 is provided with a drawer engaging portion 13 that extends downward and has an oblique angle. The pull-out engagement portion 13 engages with the engagement body 2 when the engagement body 2 enters the entry portion 15 of the support plate 6. Further, an extension piece 50 extends rearward from the rear end at the upper rear end of the locking member 8. The engaging member 8 is arranged so as to face the extending piece 50.
An extending portion extends rearward from the rear end at the rear lower end portion of the. Therefore, a substantially C-shaped notch 7b is formed at the rear end of the engaging member 8. A locking portion 51 protruding downward is provided at the rear end of the extending piece 50. Reference numeral 11 is a first spring, which is a locking member 8
It is stretched between the pin 12 projecting forward from the upper oblong hole 9 and the pin 12 projecting near the lower center of the support plate 6.

Reference numeral 14 is a latch member, and the latch member 14 is rotatably attached to one side portion of the rear portion of the support plate 6 via a rivet 10. The latch member 14 has an ear portion 16 that extends laterally outward of a vertical rear edge portion of the support plate 6, and extends in a direction opposite to the ear portion 16 and extends from a cutout portion 7 a of the support plate 6. It has a protruding latch locking portion 15.
The latch engaging portion 15 provided on the latch member 14 engages with the extending piece 50 and the engaging portion 51. The locking portion 51 is provided in a shape that can release the engagement with the latch locking portion 15 when the locking member 8 rotates slightly counterclockwise. A second spring 11a is stretched between the tip of the latch locking portion 15 of the latch member 14 and a pin protruding near the rear portion of the locking member 8. A notch 7c, which is slightly wider, is provided in front of the upper end surface of the locking member 8 in correspondence with the notch 7.

Reference numeral 17 denotes a release member, which is rotated near the upper part of the other side surface of the support plate 6 by a rivet 10 different from the above-mentioned rivet 10 via an oblong shaped portion 9 which is transparently provided on the release member 17. Loosely tacked loosely. Reference numeral 11b denotes a third spring, which is stretched between the pin 12 projecting forward from the position of the elliptical portion 9 on the release member 17 and the pin 12 projecting near the front end of the support plate 6. . Release member 1
At the upper front end of 7, there is formed a bent portion 18 which is horizontally bent across the support plate 6 and the locking member 8. In addition, a projecting portion 19 that extends so as to face the cutout portion is provided at the lower front end. Behind the release member 17, a triangular latch abutment portion 20 close to the ear portion 16 of the latch member 14 is provided.
Is provided, and its tip has a roundness.

As shown in FIG. 14, the latch mechanism 3 constructed as described above is disposed near the rear end of the money storage drawer box 21, and the plate member 4 is fixed to the inner surface portion. The money storage drawer box 21 is a spring 11 having an appropriate tension.
It is equipped with a c, for example, a cash drawer 2
1 is fixed to the back wall portion. The drawer 1 that freely slides in the money storage drawer box 21 has a rear wall portion in which a horizontally extending tip end of which is provided an engaging body 2 protruding upward. When it is completely pushed into the drawer box 21, it engages with the drawer locking portion 13 of the locking member 8. Furthermore, signaling means such as a bell 22 can be arranged in the money storage drawer box 21 to sound when the drawer 1 begins to be withdrawn.

The operation of the present invention in the above configuration will be described. The arrow indicates the moving direction of the engaging body 2. First push the drawer 1 into the money storage drawer 21 (Fig. 4,
Figure 5). The engaging portion 2 provided on the back wall portion of the drawer 1 and horizontally extending and having an upward convex portion abuts on the drawer locking portion 13 of the locking member 8, and the locking member 8 is locked by the latch engaging portion 15. Rotate as a center and push upward (Fig. 6,
(Fig. 7). At this time, the release member 17 is pushed up by the locking member 8 via the bent portion 18 (FIGS. 6 and 7). The engagement member 8 in which the engagement body 2 is sufficiently inserted into the entry portion 5 of the support plate 6 is given a rotational moment in the counterclockwise direction in FIG.
The latch engagement portion 15 and the cutout portion 7b of No. 4 are second to each other.
The engaging body 2 of the drawer 1 is engaged by the drawer locking portion 13 in the state of being engaged by the pulling force of the spring 11a (FIGS. 8 and 9). At this time, the release member 1
In FIG. 9, 7 is rotated clockwise by the urging force of the third spring 11b, and is lowered until the bent portion 18 contacts the upper surface of the support plate 6. At this time, the latch locking portion 15 is provided so as to prevent the drawer locking portion 13 from rotating in a direction opposite to the direction in which the drawer locking portion 13 is engaged with the engaging body 2 against the biasing force of the first spring 11. , The extension piece 50 is contacted to restrict the rotation of the locking member 8. Therefore, the engaging body 2 is engaged by the drawer locking portion 13, and the drawer 1 cannot be pulled out in this state. At the same time, the locking portion 51 and the latch locking portion 15 are engaged with each other to prevent the latch locking portion 15 from rotating rearward against the biasing force of the second spring 11a. This can also prevent the latch locking portion 15 from rotating rearward due to the impact when the drawer 1 is strongly pushed. For this reason, even when the drawer 1 is strongly pushed in, the engaging body 2 of the drawer 1 is reliably engaged with the drawer locking portion 13 and the money storage drawer box 21 can be closed. When the drawer 1 is locked in the money storage drawer box 21 as described above, the spring 11c shown in FIG. 14 biases the drawer 1 in the opening direction. Due to this biasing force, the engaging body 2 and the drawer locking portion 13 are firmly engaged with each other. Therefore, the locking member 8 rotates in the direction in which it engages with the engaging body 2,
That is, counterclockwise rotation is also prevented.

Next, when the drawer 1 is sufficiently pushed in the direction of the latch mechanism 3, the engaging body 2 and the drawer locking portion 13 are inserted.
Since there is a play of engagement with, the locking member 8 is slightly rotated counterclockwise by the urging force of the first spring, as shown in FIG. As a result, the engagement between the locking portion 51 and the latch locking portion 15 is released. At the same time,
As shown in FIG. 11, when the drawer 1 is sufficiently pushed in the direction of the latch mechanism 3, the engaging body 2 presses the protruding portion 19 of the releasing member 17, and the latch contact portion 20 is the ear portion 16 of the latch member 14.
And presses the ears 16 rearward. As a result, the latch locking portion 15 of the latch member 14 is pushed out from the C-shaped notch 7b provided at the rear end of the locking member 8. The release member 17 is provided by the third spring 11b in FIG.
1 receives the rotational moment in the clockwise direction, and the bent portion 1
Reference numeral 8 denotes a cutout portion 7 and a cutout portion 7c on the upper end surface of the support plate 6.
To maintain the released state (FIGS. 10 and 11). After that, the engaging body 2 of the drawer 1 pressed by the spring 11c in the opening direction rotates the locking member 8 in the released state of the latch locking portion 15 around the rivet 10 tacked to the support plate 6 and at the same time. Push it up. The engagement body 2 is released from the latch mechanism 3 when the engagement with the drawer locking portion 13 is released, and the drawer 1 is automatically pushed out by the spring 11c. Support plate 6 at the same time
The bent portion 1 of the release member 17 engaged with the notch portion 7 of the
8 is pushed up by the upper end surface of the locking member 8 and the holding of the released state for releasing the engagement is completed. At the same time when the engaging body 2 is released from the latch mechanism 3, the locking member 8 is
12, the latch engagement portion 15 of the latch member 14 is returned to the C-shaped notch 7b of the locking member 8 by the spring 11a, and is rotated by the spring 11a. Returning to the state of FIGS. 4 and 5, in this state, since the latch engagement portion 15 and the cutout portion 7b are engaged with each other, the locking member 8 causes the locking member 8 to rotate about the engagement portion. With this, it is possible to loosely rotate within the range of being tacked to the support plate 6 through the oblong hole portion 9 and to receive the engaging body 2.

The oblong elliptical hole portion 9 between the locking member 8 and the releasing member 17 may be a mere large round hole, and the springs 11, 11a and 11b respectively pull the locking member 8 in the lower right direction in FIG. It suffices to rotate counterclockwise, pull the latch member 14 leftward, and pull the release member 17 downward leftward to rotate counterclockwise. The latch mechanism 3 is aligned with the position of the engaging body 2 and the money storage drawer box 2
It can be freely attached to the left and right inside of 1 or to the ceiling. This is because the latch means 3 has springs 11 and 11.
This is because it is activated by a and 11b and is not affected by gravity. According to the device of the present invention, when the drawer 1 is pushed in, the drawer 1 is engaged and closed, and when the drawer 1 is pushed in again, the engagement is smoothly released and the drawer is automatically pushed out and opened. The operating cycle can be repeated repeatedly. Although the present invention has been variously described with reference to the preferred embodiments, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

[0016]

According to the drawer latch mechanism of the present invention, the drawer can be easily opened and closed, and the locking portion provided at the rear end of the extending piece of the locking member is preferably engaged with the latch member. Therefore, it is possible to prevent the latch member from rotating rearward from the rear end portion of the locking member due to an impact when closing the drawer. Therefore, there is an effect that the drawer can be surely closed even when the drawer is pushed in vigorously.

[Brief description of drawings]

FIG. 1 is a left perspective view showing an embodiment of a latch mechanism.

FIG. 2 is a right perspective view showing an embodiment of a latch mechanism.

FIG. 3 is an exploded view of a main part of a latch mechanism.

FIG. 4 is a left side view of the latch mechanism before the drawer is pushed in.

FIG. 5 is a right side view of the latch mechanism before the drawer is pushed in.

FIG. 6 is a left side view of the latch mechanism when the drawer is pushed in.

FIG. 7 is a right side view of the latch mechanism when the drawer is pushed in.

FIG. 8 is a left side view of the latch mechanism at the time of drawer locking.

FIG. 9 is a right side view of the latch mechanism at the time of the drawer lock.

FIG. 10 is a left side view of the latch mechanism when the drawer is pushed again.

FIG. 11 is a right side view of the latch mechanism when the drawer is pushed again.

FIG. 12 is a left side view of the latch mechanism at the time of release.

FIG. 13 is a right side view of the latch mechanism when released.

FIG. 14 is a plan view showing the internal structure of the money storage drawer base box according to the present invention.

FIG. 15 is a perspective view from the left side of a latch mechanism showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drawer 2 Engagement body 3 Latch mechanism 4 Plate member 5 Entry part 6 Support plate 7, 7a, 7b, 7c Notch part 8 Locking member 9 Oval hole 10 Rivet 11, 11a, 11b, 11c Spring 12 Pin 13 Drawer locking part 14 Latch member 15 Latch locking part 16 Ear part 17 Release member 18 Bending part 19 Projection part 20 Latch contact part 21 Money storage drawer box 22 Bell 50 Extending piece 51 Locking part

Claims (1)

[Scope of utility model registration request] 1. A rear side of the drawer box is fixed so that both side surfaces thereof face in a direction perpendicular to the front-rear direction, which is the drawing direction of the drawer box, and an engaging member provided at the rear end section of the drawer is attached to the front end section. A support plate having an entrance part that can enter and leave,
It is provided on one side surface of the support plate so as to be rotatable in a plane parallel to the side surface and movable in a front-back direction by a predetermined distance,
An engaging member formed at the front end portion with a drawer engaging portion that can engage with the engaging member when the engaging member of the drawer enters the entrance portion, and a rearward extending from the rear end portion of the engaging member. An extending piece provided, and a locking portion provided at the rear end of the extending piece,
A first spring that urges the drawer locking portion to always rotate the locking member in a direction in which the drawer locking portion engages with the engaging body, and a rear end portion of the support plate that is parallel to a side surface of the support plate. A latch provided so as to be rotatable in a plane, a second spring for urging the latch to always abut the rear end of the locking member, and a front and rear direction movement to the other side surface of the support plate. And a releasing member that pushes and rotates the latch rearward when the rearward movement is caused by the pressing of the engaging body that has deeply entered the advancement portion, and the engaging body and the drawer locking portion are provided. When the latch is engaged, the drawer locking portion resists the urging force of the first spring to prevent the latch from rotating in a direction opposite to the direction in which the latch engages with the engaging body. , Contacting the extension piece to restrict rotation of the locking member, and locking the locking member And the latch are engaged to prevent the latch from rotating rearward against the biasing force of the second spring, and the engaged drawer is slightly pushed into the drawer box, whereby the engaging body When the locking member has deeply entered the entrance portion, the locking member is slightly rotated by the urging force of the first spring to release the engagement between the locking portion and the latch, and the release member When the latch moves backward and the latch is rotated backward, the locking member is moved in a direction opposite to the urging direction of the first spring by the pressing force when the drawer is moved in the opening direction. A latch mechanism for a drawer, characterized in that the engagement between the engaging body and the drawer locking portion can be released by rotating.