JPH0567777U - Door latch mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a door latch mechanism that can increase the usable volume in the case and increase the mounting density in the case. [Structure] A bezel attached to an opening of a case formed in a rectangular tube shape with bent sides formed to face each other vertically, and one end rotatably attached to one end between the upper and lower bent sides of the bezel. Door, a pin, and a latch member composed of a leaf spring in which catch arms at both ends are symmetrically meandered so that the pin is sandwiched between the ends facing each other. It was attached to either the bent side or the upper and lower surfaces of the door.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door latch mechanism, and more particularly, to improvement of a door latch mechanism attached to an opening of a case formed in a rectangular tube shape.

[0002]

[Prior Art]

 FIG. 2 is a structural explanatory view showing an example of a conventional door latch mechanism, showing an example of a door in a recorder. In the figure, reference numeral 1 is a case formed in a rectangular tube shape, and a bezel 2 is attached to its opening. The bezel 2 is formed with bent sides 3 and 4 so as to face each other vertically. Reference numeral 5 denotes a door, one end of which is rotatably attached to one end between upper and lower bent sides 3 and 4 of the bezel 2 via a hinge 6. A pin 7 for latching is provided inside the other end of the door 5. Then, inside the side surface at the other end of the opening of the case 1, a latch member 8 having a catch arm 9 formed at one end so as to be detachably fitted to the pin 7 is fixed by, for example, a screw.

[0003]

[Problems to be solved by the device]

 That is, in the latch member 8 having such a configuration, the catch arm 9 portion must be formed long in order to avoid plastic deformation and breakage due to repetitive stress, and thus becomes elongated. In order to use the elongated latch member 8 as described above, it is inevitable to mount it on the inside of the side surface at the other end of the opening of the case 1.

As a result, the usable volume inside the case 1 becomes a value obtained by subtracting the plate thickness of the latch member 8 from the inner dimension L of the case 1, which is one of the causes for lowering the mounting density in the case 1. I am There is also a problem that the stress (displacement) generated when the end of the catch arm 9 is spread out along the outer diameter of the pin 7 concentrates only on the root, and thus fatigue easily occurs.

The present invention solves such a conventional problem, and an object of the present invention is to provide a door latch mechanism capable of increasing the usable volume in the case and increasing the mounting density in the case. It is to be realized.

[0006]

[Means for Solving the Problems]

 The present invention, which solves such a problem, has a bezel attached to the opening portion of a case formed in a rectangular tube shape with bent sides formed so as to face each other vertically, and one end of the bezel is placed above and below the bezel. A door rotatably attached to one end between the bent sides, a pin, and a latch member composed of a leaf spring in which catch arms at both ends are symmetrically meandered so as to sandwich the pin between the opposite ends. The pin and the latch member are attached to either the upper and lower bent sides of the bezel or the upper and lower surfaces of the door, respectively.

[0007]

[Action]

 Since the door is latched by the bezel part attached to the opening of the case, the internal volume of the case does not decrease due to the plate thickness of the latch member as in the past, and high-density mounting inside the case is achieved. Will be possible.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration explanatory view showing an embodiment of the present invention, and the same reference numerals are given to the same parts as those in FIG. In the figure, the pin 7 is fixed near the end of the bent side 4 below the bezel 2. Reference numeral 10 is a latch member formed of a leaf spring, and catch arms 11 and 12 at both ends are formed in a symmetrical meandering manner so as to sandwich the pin 7 between the opposite ends. The latch member 10 is screwed and fixed near the end of the lower surface of the door 5. That is, the latch member 10 is formed such that the distance between the screwed portion and the portion sandwiching the pin 7 is shorter than that of the conventional latch member 8 shown in FIG. It is possible.

In such a configuration, the distance between the entrances of the ends of the catch arms 11 and 12 of the latch member 10 is narrower than the outer diameter of the pin 7, and the diameter of the sandwiched portion is formed equal to the outer diameter of the pin 7. ing. As a result, when the door 5 is latched, the ends of the catch arms 11 and 12 of the latch member 10 are pushed out along the outer diameter of the pin 7, and then the pin 7 is pinched in the pinching portion. When releasing the latch, the reverse operation is performed.

Further, since the catch arms 11 and 12 of the latch member 10 are made to meander symmetrically, the stress generated when the ends of the catch arms 11 and 12 are pushed and spread along the outer diameter of the pin 7 ( (Displacement) can be distributed to the meandering portion and the root portion of the catch arms 11 and 12, and the fatigue of the latch member can be reduced as compared with the conventional latch member 8 shown in FIG.

The plate thickness of the latch member used in the present invention, the meandering shape of the catch arm, the number of meandering, etc. may be appropriately set according to the load and the application. Further, the pin may be attached to the door side and the latch member may be attached to the case side, and these attachment positions may be on the upper side.

[0012]

[Effect of the device]

 As described above, according to the present invention, it is possible to realize the door latch mechanism that can increase the usable volume in the case and increase the mounting density in the case.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is a structural explanatory view showing an example of a conventional door latch mechanism.

[Explanation of symbols]

 1 Case 2 Bezel 5 Door 6 Hinge 7 Pin 10 Latch Member 11, 12 Catch Arm

Claims (1)

[Scope of utility model registration request] 1. A bezel attached to an opening portion of a case formed in a rectangular tube shape having bent sides formed so as to face each other vertically, and one end thereof pivots to one end between the upper and lower bent sides of the bezel. A door that can be attached, a pin, and a latch member composed of a leaf spring in which catch arms at both ends are symmetrically meandered so as to sandwich the pin at the opposite ends, and the pin and the latch member are A door latch mechanism that is attached to either the upper or lower bent sides of the bezel or the upper and lower surfaces of the door, respectively.