JPH07286462A - Latch - Google Patents

Abstract

PURPOSE:To firmly fix a fixed cylinder to a body by providing a pair of holding pieces connected to the front half part of a rod sliding in the fixed cylinder by a hinge, and housing a spring for pushing the rod forward in such a manner as to be received by the rear half part. CONSTITUTION:A rod 2 has an opening part 5 opened to the lower surface and the rear surface on the rear half part, and a spring 4 is housed therein. When a rod 2 is pushed into a fixed cylinder by closing a door, the spring 4 is compressed between the rear wall of the fixed cylinder 1 and the front wall 5' of the opening part 5. The force for opening the door next is stored. Since the spring 4 is housed in such a manner as to be received by the rear half part of the rod 2, the weakening of the spring is eliminated. Thus, the length of a product can be shortened to downsize the product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch device, which is not particularly limited, but when used for a hinged door without a handle, the door is locked in a closed state and opened. In this case, the present invention relates to an embossing type latch device that pushes the door once and releases the hand to push the door slightly in the opening direction.

[0002]

2. Description of the Related Art The applicant of the present invention discloses in Japanese Utility Model Application No. 57-44631 (58-148160) that a fixed cylinder, a rod, a cam pawl rotatably mounted on the rod, a fixed cylinder and a rod are used. We proposed an embossed latch that consists of four coil springs that are compressed when the door is closed and that accumulate the spring force that pushes the rod out of the fixed cylinder when the door is opened. This conventional device is equipped with a crotch-shaped clip that elastically holds the strike attached to the back of the door at the tip of the rod, and when the door is closed, this clip holds the strike of the door and prevents the door from opening. To prevent. Further, a long groove in the longitudinal direction is provided on the rear part of the rod that slides back and forth in the fixed cylinder, and a tongue piece having a projection at its free end is provided on a part of the cylinder wall on the fixed cylinder. By engaging with, the sliding of the rod is guided and the rod is prevented from coming out of the fixed cylinder.

[0003]

In the above-mentioned conventional device, the spring for pushing the rod forward is wound around the rod itself, and the rear end of the spring is received by the flange at the front end of the fixed cylinder. For this reason, the rod needs to be provided with a brim that receives the front end of the spring after the clip at the tip, and the rear part of the rod is pushed deep into the fixed cylinder, and even when the door is closed, the front end of the fixed cylinder is closed. The rod extends to the outside and the length of the latch in the front-rear direction is significantly increased. Therefore, the latch can be fixed only to the main body having a long space in the front-rear direction, the usable range of the latch is limited, and in order to fix the latch to the main body, the main body and the fixing tube of the latch are fixed. It is necessary to use a member that connects the front end flange and the flange, and it is difficult to firmly fix the latch to the main body.

[0004]

The present invention was developed in order to solve the above-mentioned problems, and a fixed cylinder fixed to a main body on which a door is hinged, and a strike behind the door by closing the door. In a latch having a rod that is pushed into the main body against the bias of the spring and that holds the strike and keeps the door closed, the first half of the rod (2) that slides in the fixed cylinder (1). The part has a pair of holding pieces (13, 13) connected by a hinge (12), and is housed so as to receive a spring (4) that pushes the rod forward in the latter half of the rod (2). Characterize.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. By the way, 1 is a fixed cylinder whose rear end is closed and front end is open, 2 is a rod, 3 is a cam pawl rotatably mounted on the rod, 4 is a coil spring compressed between the fixed cylinder and the rod, Others are molded plastic products.

The latter half of the rod has an open portion 5 open to the lower surface and the rear surface, and the spring 4 is housed in this open portion.
Therefore, when the rod is pushed into the fixed cylinder by closing the door, the spring is compressed between the rear wall of the fixed cylinder and the front wall 5'of the open portion, and stores the force for the next opening of the door. In this way, since the spring 4 is housed so as to be received in the latter half of the rod 2, not only the spring does not become stiff, but the length of the product can be shortened and the product can be downsized. Have. A cam claw 3 is pivotally attached to the upper surface of the rear half of the rod, and a stopper 6 is provided in front. The stopper engages with a long hole 1'in the front-rear direction provided in the upper wall of the fixed cylinder to guide and regulate the slide of the rod in the front-rear direction.

The length between both ends of the cam claw 3 is approximately equal to the width of the rear half of the rod, and a V-shaped notch 7 is provided at each end thereof.
With one rounded stroke, shoulder corner 8 has rotational symmetry,
The other corner 9 is sharp with the side surface of the nail and the notch 7 intersecting.

Further, the fixed cylinder is a first projection claw that is engaged with a notch 7 at one end of the cam claw and rotates the cam claw by a small amount when the rod is most pushed into the inner wall on one side. 10, the inner wall on the other side has a second protruding claw 11 slightly away from the back.
The front end portion 1a of the fixed cylinder extends left and right, and the left and right sidewalls are provided with U-shaped notches to provide the tongue piece 1b with the free end protruding outward. The distance between the two is approximately equal to the plate thickness of the main body 19. Therefore, as shown in FIG. 3, a hole having the same shape as the contour of the rear portion of the fixed cylinder is opened in the main body 19, and when the fixed cylinder is pushed into the hole from the rear end portion, the free end of the tongue piece 1b and the front end portion 1a are formed. It can be easily attached by sandwiching the main body 19 with the rear surface.

The operation of the cam claw 3 and the both projection claws 10 and 11 is exactly the same as the prior proposal. When the door is pushed until the closing position is slightly passed and the rod is pushed deepest into the fixed cylinder against the spring, the cam is released. The claw rotates a small amount by the first protrusion claw 10 (FIG. 4).
When the pushing of the door is stopped in this state, the rod is pushed out a little due to the restoring force of the coil spring, and the door moves a little in the opening direction, but the one side 7a of the notch 7 of the cam claw that has rotated a small amount causes the second projection in the middle. By engaging the claw 11, the cam claw further rotates, and the sharp corner 9
Is hooked on the inner wall on one side of the fixed barrel, the cam claw is blocked in the state of being rotated about 45 ° in the fixed barrel, and the rod is not pushed out further and locked with respect to the fixed barrel. At this position, the door is just closed (Fig. 5).

Next, to open the door, push the door again. Then the rod is pushed all the way in again, and the cam claws are stroked so that the corners of the shoulder 8
Then, it engages with the first projection claw 10 and further rotates about 45 ° to be in a direction substantially orthogonal to the rod (FIG. 6). Then, when the pushing is stopped, the rod is pushed out by the restoring force of the spring, and the cam claw is stroked to engage the second projection claw 11 at the corner 8 of the shoulder and further rotate 90 ° to be aligned with the rod ( 7), stopper 6
The rod is pushed out until it abuts the front end of the slot 1 '(Fig. 8), and the door is opened slightly. When the door is closed, the rod is pulled into the fixed barrel, and when the door is opened, the front half of the rod that comes out of the fixed barrel is a pair of holding pieces 13, 13 connected to the latter half by a thin hinge 12.

The pair of holding pieces 13 and 13 are formed in an inverted C-shape which is opened obliquely outward, and the hinge inner side surface 15 of each holding piece 13 and the holding cylinder for holding the strike 14 are fixed cylinders. Inner surface 1 of the base when immersed in
5 is provided with a deformable protrusion 17 on either one or both of the front end faces 16 of the rear half of the rod (FIGS. 9 and 1).
0).

Therefore, according to the present invention, when pushed to close the door, the strike 14 abuts the front end face 16 of the rear half of the rod and pushes the rod 2 into the fixed barrel 1. As a result, the pair of holding pieces 13, 13, which are the first half of the rod, are slidably contacting the rim of the fixed cylinder in order to enter the fixed cylinder, and the hinges 1 are respectively
2 bends and bends inwardly, and the hinge-side inner surface 15
Then, the protrusions 17 on one or both of the front end faces 16 of the latter half of the rod come into contact and are deformed, and in this state, the tip end of the strike 14 is sandwiched (FIG. 3).

In this case, the holding piece 13 is provided with a thickened portion 13 'for sandwiching the strike a little later than the tip, and the strike is provided with a recessed portion slightly after the tip to provide a thickened portion 13'.
Is to enter the recess and sandwich the strike, or as shown in the figure, an enlarged portion 14 'is provided at the tip of the strike, and the thickened portion 13' sandwiches the strike after the enlarged portion 14 'so that the sandwiched strike does not come off. Is preferred.

Then, a pair of holding pieces 1 for opening the door.
When 3 and 13 come out from the front end of the fixed barrel 1, the elastic restoring force of the hinge 12 bent inward and the deformed protrusion 17 are generated.
The pair of holding pieces 13 and 13 open outward in an inverted C-shape to release the strike due to the elastic force that tries to restore, so the door is strongly pulled forward to escape the strike from the clip as in the past. You can open the door without any need to pull. Therefore, there is no fear that the stopper 6 will malfunction. Further, the protrusion 17 also functions as a stopper that prevents the holding pieces 13 and 13 from being excessively bent inward and being torn from the hinge 12.

[0015]

As is apparent from the above, according to the present invention, since the spring 4 is housed so as to be received by the rear half portion of the rod 2, the spring 4 does not bend. Moreover, the length of the product can be shortened, and the product can be downsized.
In particular, it is possible to provide a very advantageous latch when it is used for a portion having a small depth space, such as when it is used as a lid of an operation button of a television or a lid of a compact disc player.

[Brief description of drawings]

FIG. 1 is a plan view of a latch.

FIG. 2 is a vertical sectional side view of a latch.

FIG. 3 is an explanatory view of a state where the strike pushes the rod into the fixed cylinder.

FIG. 4 is an explanatory diagram of a state in which the rod is pushed in until it comes into contact with the inside of the fixed cylinder.

FIG. 5 is an explanatory view of a state in which the rod holds a strike.

FIG. 6 is an explanatory view of a state in which the rod is pushed in again to release the holding of the strike.

FIG. 7 is an explanatory diagram of a state in which the rod is being pushed out.

FIG. 8 is an explanatory view of a state in which the rod releases the strike.

FIG. 9 is a plan view of a portion of another example of the rod in a strike-released state.

10 is a plan view of a part of the rod of FIG. 9 in a strike holding state.

[Explanation of symbols]

 1 Fixed cylinder 1a Front end 1b Tongue piece 2 Rod 3 Cam claw 4 Coil spring 6 Stopper 12 Hinge 13 Holding piece 14 Strike

Claims (1)

[Claims] 1. A fixed cylinder fixed to a main body with a hinged door, and a strike on the back of the door to push the door against the bias of a spring by closing the door to hold the strike and open the door. In a latch having a rod for keeping it in a closed state, a pair of holding pieces (13, 1) connected by a hinge (12) is provided at the front half of the rod (2) sliding in the fixed cylinder (1).
3) which is housed to receive a spring (4) which pushes the rod forward in the latter half of said rod (2).