JP2639643B2 - latch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch,
In particular, but not limited to this, when used on a hinged door without a handle, the door is locked in the closed state, and when opening the door, once the door is pushed in and released, the door is closed. The present invention relates to a floating latch that can be slightly pushed open in a door opening direction.

[0002]

2. Description of the Related Art The present applicant discloses a fixed cylinder, a rod, a cam claw rotatably mounted on the rod, a fixed cylinder and a rod in Japanese Utility Model Application No. 57-44631 (Japanese Utility Model Application Publication No. 58-148160). It is compressed during closing between the number of parts consisting of four points of the coil spring to accumulate a biasing force for pushing the rod from the fixed cylinder when the door opening is proposed a very little relief latch in.

In this conventional latch, a crotch-shaped clip for elastically holding a strike attached to the back of the door is provided at the end of the rod. When the door is closed, the clip holds the strike of the door. Prevent the door from opening. Also,
A long groove in the longitudinal direction is provided at a rear portion of the rod that slides back and forth in the fixed cylinder, a tongue having a projection at a free end is provided on a part of the cylinder wall, and the projection is engaged with the long groove of the rod. By combining them, the sliding of the rod is guided, and the rod is prevented from falling out of the fixed cylinder.

[0004]

In THE INVENTION to be solved INVENTION The above described conventional latches, wound coil spring which pushes the rod forward out of the rod itself, the rear end of the coil spring is adapted to receive at the front end of the flange of the fixed tube . Therefore, the rod must be provided a collar for receiving the front end of the coil spring after the clip tip, the rear of the rod in the fixed barrel
Even when the door is closed, the rod extends long from the front end of the fixed cylinder 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, and the usable range of the latch is limited.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a fixed cylinder fixed to a body to which a door is hinged, and the door is closed by closing the door. It pushed against the backing of the strike in the fixed barrel to the biasing of the coil spring, the latch having a rod keep the holding the strike closed the door, the fixed cylindrical with (1) a synthetic resin in integrally molded, the solid
Place the other end of the coil spring (4) on the bottom of the fixed cylinder (1).
A positioning portion (1c) for positioning the fixed cylinder;
A through-hole (1 ') is provided in the peripheral wall of (1), and a pair of holding pieces (1) are connected to the front half of a rod (2) that slides in the fixed cylinder (1) via a hinge (12). 13, 13), and the rod (2) is provided in the latter half of the rod (2).
Only set the accommodating portion (5) for housing from one end in the extended state of the coil spring (4) which positively pushes to accept one third to two thirds, and the upper surface of the rod (2), before Symbol it characterized in that a stopper (6) entering the transmural Tsuchoana (1 ').

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a fixed cylinder having a closed rear end and an open front end, 2 is a rod, 3 is a cam claw rotatably mounted on the rod 2, and 4 is a compression between the fixed cylinder 1 and the rod 2. shows a coil spring that is, the coil spring 4
The others are plastic molded products.

[0007] Rod 2 has an opening 5 which serves as a container for accommodating the coil spring 4 which is open to the lower surface and the rear surface in the second half portion, the coil spring 4 in the opening portion 5, the forward rod 2 One-third to two-thirds from one end in the extended state are stored. Thus, by closing the door and push the rod 2 into the fixed barrel 1, co
Yl spring 4 is compressed between the front wall 5 'of the wall and the open portion 5 after the fixed barrel 1, and then stores the force when opening the door. Thus, 2 of 1 to 3 thirds of the coil spring 4 rod 2
Because it is accommodated to be received in opening 5 provided in the second half portion of only Koshiku coil spring 4 is eliminated to ensure, also, it is possible to shorten the length of the product, product miniaturization can be achieved .

[0008] Note that the second half upper surface of the rod 2, the cam pawl 3 is pivotally mounted to the rear, before, there is a stopper 6 with a slope 6 'descending obliquely after filtration facing the upper rear. Stopper 6
Engages with the longitudinal through-hole 1 ′ provided on the upper wall of the fixed cylinder 1, guides and regulates the sliding of the rod 2 in the front-rear direction, and applies a small force to the rod 2 so that the rod 2 is fixed. 1, the inclined surface 6 ′ lifts the front end 1 a of the upper wall of the fixed cylinder 1 from below and slips below the lower end, thereby forming the through-hole 1 ′.
Therefore, the fixed cylinder 1 and the rod 2 can be easily assembled.

[0009] Upon completion of assembly, the stopper 6 'enters into the through-slot 1' through slot 1 can recognize in visible or sound to engage the front edge of, facilitate completion of the assembly Can be confirmed. Further, when the rod 2 is pulled forward and a force is applied to pull the rod 2 out of the fixed cylinder 1, the stopper 6 comes into contact with the front end of the elongated through hole 1 'and resists, so that the rod 2 is surely removed from the fixed cylinder 1. Can be blocked.

The length between both ends of the cam pawl 3 is almost equal to the width of the rear half of the rod 2, and each end of the cam pawl 3 has a V-shaped notch 7 and one of the rounded strokes of the shoulder. The corner 8 has a rotational symmetry, and the other corner 9 is sharp because the notch 7 meets the side surface of the nail. In addition, the fixed cylinder 1 is a first projection which is engaged with the notch 7 at one end of the cam pawl 3 when the rod 2 is pushed most, and rotates the cam pawl 3 by a small amount. Claw 10, the second projection claw 1 on the other inner wall slightly away from the back
One.

The front end 1a of the fixed cylinder 1 projects left and right,
The right and left side walls are provided with U-shaped cuts, and a tongue piece 1b having a free end protruding outward is provided, and the distance between the free end of the tongue piece 1b and the rear surface of the front end 1a is substantially equal to the thickness of the main body 19. It is matched. Therefore, as shown in FIG. 3, a hole having the same shape as the contour of the rear part of the fixed cylinder 1 is formed in the main body 19, and when the fixed cylinder 1 is pushed into the hole from the rear end, the free end and the front end of the tongue piece 1b are formed. the body 19 with the rear surface of the parts 1a clamping Munode can easily installed.

[0012] cam pawl 3, the operation of both projection claws 10 and 11 prior proposed identical, push the door until slightly past the closed position, the rod 2 against the coil spring 4 into the fixed barrel 1 < When pushed deepest, the cam pawl 3 pivots a small amount by the first protruding pawl 10 (FIG. 4). If you stop pushing the door in this state,
Rod 2 is slightly pushed by the restoring force of the coil spring 4, although the door is slightly moved in the opening direction, one side 7a of the notch 7 of the cam pawl 3 that a small amount pivot is engaged with the second projection pawl 11 in the middle further rotating the cam pawl 3 Te, rod 2 more in stopped state was approximately 45 degrees rotation in a solid Teitsutsu 1 is not pushed out, is locked to the fixed tube 1. At this position, the door is just closed (FIG. 5).

Next, when the door is pushed again to open the door,
The rod 2 is pushed again to the back, and the cam pawl 3 is stroked to engage with the first protruding pawl 10 at the corner 8 of the shoulder, and is further rotated by about 45 ° to a direction almost perpendicular to the rod 2 (FIG. 6). . Therefore, the stop push rod 2 by the restoring force of the coil spring 4 is pushed, the cam pawl 3 further 90 ° rotation engages the second protrusion claw 11 at excessive 8 Nadegata, the rod 2 The stoppers 6 are aligned in the same direction (FIG. 7), and the stopper 6 is in front of the through-hole 1 '.
The rod 2 is pushed out until it touches the end (FIG. 8) and the door opens slightly.

When the door is closed, the rod enters the fixed cylinder 1, and when the door is opened, the front half of the rod 2, which comes out of the fixed cylinder 1, has a pair of holding pieces 13 connected to the rear half via a thin hinge 12. , 13. This pair of holding pieces 13,
Reference numeral 13 denotes an inverted C-shape which is opened obliquely outward, and the inner surface 15 of the base of each holding piece 13 on the hinge 12 side and each holding piece 1
A protrusion 17 is provided on one or both of the rear end portion 16 of the rod 2 and the front end surface 16 of the rod 2 facing the base inner surface 15 when the rod 3 is immersed inside the fixed cylinder 1 to hold the strike 14 ( 9 and 10).

[0015] Therefore, according to the present invention, pressing to close the door strike 14 <br/> writes press contact with the front end surface 16 of the second half portion of the rod 2 the rod 2 into the interior of the fixed cylinder 1 Therefore, a pair of holding pieces 13, which are the first half of the rod 2,
Numeral 13 denotes a sliding contact with the rim of the fixed cylinder 1 in order to enter the fixed cylinder 1 and flexes the hinges 12 to bend inward, respectively, and a base inner surface 15 on the hinge 12 side and a front end surface 16 of the rear half of the rod 2. The projections 17 on one or both of them abut and deform, and in this state, pinch the tip of the strike 14 (FIG. 3).

In this case, each holding piece 13 has a strike 1
4 is provided with a thickened portion 13 'slightly behind the tip, a strike 14 is provided with a constricted recess slightly behind the tip, and the thickened portion 13' enters the recess to sandwich the strike 14. , An enlarged portion 14 'is provided at the tip of the strike 14, and the thickened portion 13' is
4 to sandwich the strike 14 behind the 'preferred not missing strike 14 sandwiched.

Then, in order to open the door, a pair of holding pieces 1
When the fixed members 3 and 13 move out of the front end of the fixed cylinder 1, the elastic restoring force of the hinge 12 bent inward and the deformed protrusion 17
And a pair of holding pieces 13
Opens the strike 14 outward and opens the strike 14, so that it is not necessary to pull the door strongly in order to escape the strike 14 from the clip as in the past, and the door can be opened without difficulty. In addition, there is no possibility that the stopper 6 may break down, and the projection 17 also functions as a stopper for preventing the holding pieces 13, 13 from being excessively bent inward and breaking from the hinge 12.

[0018]

As it is evident from the foregoing description, according to the present invention, carp
Le spring 4, housing portion provided in the second half portion of the rod 2 (5)
In addition, since one-third to two-thirds are accommodated from one end of the extended state in which the rod 2 is pushed forward, only the stiffness is reliably eliminated. Also, the length of the product can be shortened,
To provide a latch that can be downsized, and is particularly advantageous when used in places where the depth space is small, such as when used for the lid of a TV operation button or the lid of a compact disc player. Can be.

Further, a stopper 6 is provided on the upper surface of the rod 2 so as to enter the elongated through hole 1 ′ of the fixed cylinder 1. More than necessary can be restricted.
Then, although the stopper 6 from the latter half upper surface of the rod 2 is up, since the upper portion of the rear end of the stopper 6 has a slope 6 'descending obliquely after filtration direction, fixed barrel rod 2 by adding a little force by pushing into the 1, slope 6 '
Lifts the front end 1a of the upper wall of the fixed cylinder 1 from below and slips down and engages with the elongated through hole 1 ', so that the fixed cylinder 1 and the rod 2 can be easily assembled.

Further, a stopper 6 is provided on the upper surface of the rod 2 so as to enter the elongated through hole 1 ′ of the fixed cylinder 1. More than necessary can be restricted.
And since the fixed cylinder 1 is integrally molded with synthetic resin,
The number of points is reduced, and the fixed cylinder 1 and the rod 2 can be easily assembled.

[Brief description of the drawings]

FIG. 1 is a plan view of a latch.

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

3 is an explanatory view of a state where the strike is crowded press rod in the fixed cylinder.

[4] the rod is an explanatory view of a press with filled-in state until it abuts against the back of the fixed cylinder.

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

6 is an explanatory view showing a state in which elaborate again <br/> press rod to release the holding of the strike.

[7] rod is an explanatory view of a state going issued press.

FIG. 8 is an explanatory view of a state in which a rod has released a strike.

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fixed cylinder 1a Front end 1b Tongue piece 1c Positioning part 1 'Penetrating long hole 2 Rod 3 Cam claw 4 Coil spring 5 Opening part 5' Front wall 6 Stopper 6 'Slope 7 Notch 7a One side 8 Corner 9 Corner 10 First projection pawl 11 second protrusion claw 12 hinge 13 holding piece 13 'fat thickness portion 14 strike 14' ampulla 15 base inner surface 16 front surface 17 protrusions 19 body

Claims (1)

(57) [Claims] 1. A fixed cylinder fixed to a main body to which a door is hinged, and a closed strike of the door causes a strike behind the door to be pushed into the fixed cylinder against the bias of a coil spring, In a latch having a rod that holds a strike and keeps the door closed, the fixing member (1) is integrally formed of synthetic resin, and the other of the coil spring (4) and end
A positioning part (1c) for positioning the side is provided, a through-hole (1 ') is provided in a peripheral wall of the fixed cylinder (1), and a first half of a rod (2) sliding in the fixed cylinder (1). And a pair of holding pieces (1) connected via a hinge (12).
(3, 13) is provided in the rear half of the rod (2) so as to receive one-third to two-thirds from one end of the coil spring (4) in an extended state for pushing the rod (2) forward. setting a receiving portion (5) for accommodating only the upper surface of the rod (2), before providing the stopper (6) entering the Kinuki Tsuchoana (1 '), a latch, characterized in that.