CN204126419U - A kind of automatic pinning - Google Patents

Abstract

The utility model discloses an automatic latch, which comprises a latch box and a latch rod movably mounted on the latch box. A locking hook is hinged on the outside of the latch box through a rotating shaft. The axis of the rotating shaft is perpendicular to the longitudinal axis of the latch rod. One end is provided with a hook part, and the end of the lock hook away from the hook part is equipped with a first return spring, the rotating shaft is located between the hook part and the first return spring, and a guide groove is arranged on the latch box, and the hook of the lock hook The part extends into the guide groove, the hook part is provided with a first guide surface and a first limit surface, a limit block is arranged on the latch rod, and a second limit surface is arranged on the limit block, and the second limit surface can be connected with The first limit surface cooperates so that the hook portion hooks the limit block, and the latch rod is sleeved with a second return spring that can be squeezed by the limit block and the latch box when the latch rod is pushed. The utility model has the advantages of simple structure and durability, and the self-locking or unlocking function can be realized only by pressing the latch rod or the lock hook when in use, and the use is very convenient.

Description

an automatic plug

technical field

The utility model belongs to the field of latches, in particular to an automatic latch.

Background technique

Existing latch generally comprises plunger and manual lever, and plunger is generally cylindrical, and its front and rear ends are equally big. During use, the rear end of the inserting rod generally slides into the matching bracket. When the door needs to be opened, the manual lever is slid out of the bracket, which cannot automatically eject from the bracket, which is not convenient enough to use. A kind of safety bolt is disclosed in Chinese utility model patent specification CN103806768A, when doors and windows are locked, press the push handle, and the safety pin is inserted into the safety hole under the action of the positioning spring to limit the reset of the bolt lever. When the doors and windows need to be opened, the safety pin is pulled open by hand, and the latch lever returns to the initial position under the action of the return spring.

In the Chinese utility model patent CN2036989U, an automatic latch is disclosed. When latching the door, press and hold the handle to push the door. When the door is pushed tightly, the push rod returns to the spring, moves forward, and disengages the latch rod. The latch rod is pushed by the spring. out and into the pin hole on the door frame. When opening the door and window, pinch the reset lever protruding from the handle, the reset lever will pull the latch lever back, and the spring will push back the push rod to automatically block the tail of the latch lever, so that the head of the latch lever can be retracted and locked in the housing. A kind of automatic latch is disclosed in Chinese utility model patent CN2215005Y, when latching a door, the door is pushed in place and needs to press the handle to insert the latch rod into the pin hole, and now the latch is in working order. When opening the door, press the reset lever against the elastic force of the spring to retract the latch lever, and when the handle blocks the latch lever, release the reset lever to open the door.

Above three patents all are to utilize safety pin (or push rod) to realize latching or opening the door to latch lever reset restriction, can realize automatic latch function. During the working process of the latch, the moving direction of the safety pin (or push rod) is perpendicular to the moving direction of the latch rod. But in the middle of using, it is necessary to push (or pull) the safety pin to realize the automatic reset (or pin dead) function of the latch. In the utility model patent CN103806768A, when the safety pin is unlocked, it is necessary to overcome the spring force and pull the safety pin to release the limit on the latch rod. In the utility model patent CN2036989U, when the latch is reset, the button needs to be pressed manually, and the latch rod is lifted through the inclined plane, so as to realize opening the door. In the utility model patent CN2215005Y, the handle needs to be pressed when the latch works, and the reset lever needs to be pressed when the latch lever is reset.

In the above patents, the push and pull motion operation of the safety pin (or push rod) is not convenient enough, and the utility model patent CN2215005Y latch structure is more complicated and the cost is higher.

Utility model content

In view of the above defects or improvement needs of the prior art, the utility model provides an automatic latch, which aims to overcome the problems of inconvenient operation and complicated structure in the existing automatic latch.

In order to achieve the above object, according to one aspect of the utility model, an automatic latch is provided, which includes a latch box and a latch rod that is movably mounted on the latch box. The outer side of the latch box is hinged with a lock hook through a rotating shaft. The axis is perpendicular to the longitudinal axis of the latch rod. One end of the lock hook is provided with a hook portion, and the end of the lock hook away from the hook portion is equipped with a first return spring that can be squeezed by the lock hook and the latch box. Between the hook part and the first return spring, the latch box is provided with a guide groove, the hook part of the lock hook extends into the guide groove, the hook part is provided with a first guide surface and a first limit surface, and the latch rod A limit block is arranged on the limit block, and a second limit surface is arranged on the limit block. The second limit surface can cooperate with the first limit surface so that the hook part hooks the limit block. When the latch lever is pushed, the second return spring is co-extruded by the limit block and the latch box, and the end of the second return spring away from the limit block is fixedly connected to the latch box.

Preferably, the guide groove is arranged along the longitudinal direction of the latch box, and one end of the limiting block extends into the guide groove.

Preferably, the limit block is provided with a second guide surface to facilitate its sliding along the first guide surface.

Preferably, the limiting block includes a baffle arranged on the latch rod and a stopper arranged on the baffle, the stopper protrudes into the guide groove, and the second guide surface is arranged on the stopper.

Preferably, the limiting block includes a baffle arranged on the latch rod and a stopper arranged on the baffle, the stopper protrudes into the guide groove, and the second limiting surface is arranged on the stopper.

Preferably, the width of the guide groove is slightly larger than the width of the stopper.

Preferably, a fixing ear plate is provided on the outside of the plug box.

Preferably, a handle is provided on the latch lever.

Preferably, the first guide surface is an inclined surface or an arc surface.

Preferably, the latch box includes a housing and a top plate and a bottom plate respectively covering the upper end and the lower end of the housing, the guide groove is provided on the side wall of the housing, and the top plate can limit the limit block to the latch box. Inside.

Generally speaking, compared with the prior art, the above technical solutions conceived by the utility model can achieve the following beneficial effects: when the latch is in use, press the latch lever to overcome the elastic force of the second return spring to make the latch lever go downward Move, when the limit block contacts the first guide surface on the lock hook, the lock hook will rotate around the rotating shaft, and the hook part moves toward the outside of the latch box. When the second limit surface moves below the first limit surface, Under the action of the elastic force of the first return spring, the lock hook rotates and resets, and now the latch lever can be released to realize the self-locking of the latch. When the lower end of the lock hook is pressed, the lock hook rotates at a certain angle to release the hook part and the limit block, and the latch rod can be reset under the elastic force of the second spring, thereby realizing the automatic rebound of the latch rod. The utility model is simple in structure and durable in use, and the self-locking or unlocking function can be realized only by pressing the latch rod or the lock hook when in use, and the use is very convenient.

Description of drawings

Fig. 1 is a sectional view of the utility model when the latch lever is not pressed;

Fig. 2 is the front view of the utility model after pressing the latch lever

Fig. 3 is a sectional view along line A-A in Fig. 2 .

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Referring to Figures 1 to 3, an automatic latch includes a latch box 16 and a latch rod 17 movably mounted on the latch box 16, the top of the latch rod 17 is provided with a handle 1; the outside of the latch box 16 passes through The rotating shaft 8 is hinged with a lock hook 6, the axis of the rotating shaft 8 is perpendicular to the longitudinal axis of the latch rod 17, one end of the lock hook 6 is provided with a hook portion 22, and the end of the lock hook 6 away from the hook portion 22 is equipped with a The first return spring 9 co-extruded by the hook 6 and the latch box 16, the rotating shaft 8 is located between the hook part 22 and the first return spring 9, the latch box 16 is provided with a guide groove 3, and the hook of the lock hook 6 The hook portion 22 extends into the guide groove 3 , and the hook portion 22 is provided with a first guide surface 20 and a first limit surface 7 .

A limit block 18 is arranged on the latch rod 17, and the first guide surface 20 is an inclined surface or an arc surface so as to guide the limit block. The limiting block 18 is provided with a second limiting surface 19 , and the second limiting surface 19 can cooperate with the first limiting surface 7 so that the hook portion 22 hooks the limiting block 18 . When the second limiting surface 19 is in contact with the first limiting surface 7 , the limiting block 18 is limited by the hook portion 22 .

One end of the first return spring 9 is connected to the lock hook 6 , and the other end is in contact with the housing 13 and this end can be fixedly connected to the housing 13 or not fixedly connected to the housing 13 . In addition, the first return spring 9 can be a compression spring or a leaf spring.

The latch rod 17 is sleeved with a second return spring 12 that can be squeezed by the limit block 18 and the latch box 16 when the latch rod 17 is pushed. The top plate 2 can limit the limiting block 18 in the latch box 16 to prevent the limiting block 18 from rushing out of the latch box 16 under the restoring force of the second return spring 12 .

The guide groove 3 is provided along the longitudinal direction of the latch box 16, and one end of the limit block 18 extends into the guide groove 3, and the limit block 18 is provided with a second stop which facilitates its sliding along the first guide surface 20. The guiding surface 21 is used to facilitate the sliding of the limiting block 18 on the first guiding surface 20 . Two fixed lugs 15 are arranged symmetrically on the outside of the latch box 16, so as to facilitate the installation of automatic latches on doors and windows.

The limiting block 18 includes a baffle 14 arranged on the latch rod 17 and a stopper 5 arranged on the baffle 14, the stopper 5 extends into the guide groove 3, the second limiting surface 19 and The second guide surfaces 21 are all arranged on the stopper 5 .

The latch bar 17 comprises an upper latch bar 4 and a lower latch bar 11, and the latch box 16 includes a housing 13 and a top plate 2 and a bottom plate 10 which are respectively covered on the upper end and the lower end of the housing 13, and the upper and lower ends of the housing 13 are connected with the top plate respectively. 2 and the bottom plate 10 are fixed, wherein the casing 13 and the bottom plate 10 can be connected by welding or threaded connection, and the casing 13 and the top plate 2 can be connected by threaded connection. The upper latch rod 4 passes through the top board 2 , and the lower latch rod 11 passes through the bottom board 10 .

The baffle plate 14 of the limiting block 18 is welded or screwed on the middle part of the latch rod 17, thereby the latch rod 17 is divided into the upper latch rod 4 and the lower latch rod 11, the stopper 5 is welded on the baffle plate 14, and the guide groove 3 pairs of stoppers 5 play a guiding role. The guide groove 3 is arranged on the side wall of the housing 13, and the stopper 18 is fixed in the middle of the latch rod 17. The width of the guide groove 3 is slightly larger than the width of the stopper 5, and the stopper 5 is guided by the guide groove 3.

A second return spring 12 is fixed between the bottom plate 10 and the baffle plate 14, and the second return spring 12 is mounted on the lower latch rod 11. The second return spring 12 and the bottom of the baffle plate 14 can be fixedly connected or not. ; If both ends of the second return spring 12 are connected to the baffle plate 14 and the bottom plate 10 respectively, this can further prevent the limiting block 18 from rushing out of the latch box 16 .

Baffle plate 14 is fixed on the lower end of upper latch rod 4 . When the limit block 18 is not hooked by the hook portion 22 , the second return spring 12 is in a compressed state, and its elastic force makes the top surface of the baffle plate 14 and the bottom surface of the top plate 2 fit together.

The fixed handle 1 at the top of the upper latch bar 4, the two connection methods can be threaded, or the two are connected together with screws.

During use, the latch box 16 can be installed on the door and window, and a latch hole is installed at the position facing the lower latch bar 11 on the door and window frame.

Referring to FIG. 2 and FIG. 3 , they are respectively a front view and a cross-sectional view after the latch lever 17 is pressed down. When the latch is working, hold down the handle 1 so that the lower latch rod 11 stretches out from the bottom plate 10, and the stopper 18 squeezes the second return spring 12, and now the stopper 5 slides in the guide groove 3. When the block 5 is in contact with the hook portion 22 on the lock hook 6, the first guide surface 20 and the second guide surface 21 slide relative to each other, so that the lock hook 6 can rotate a certain angle around the rotating shaft 8. After the second limiting surface 19 (ie the top surface of the block 5 ) slides past the first limiting surface 7 , the lock hook 6 is reset under the action of the first return spring 9 . Loosen the handle 1, the elastic force of the second return spring 12 pushes the limit block 18 upwards, the first limit surface 7 of the hook part 22 can limit the upward sliding of the block 5, the hook part 22 and the second return spring 12, so as to achieve the purpose of self-locking. When the doors and windows need to be opened, press the lower end of the lock hook 6 to squeeze the first return spring 9, so that the first limit surface 7 of the hook part 22 is released from the restriction on the stopper 5, and the second return spring 12 Under the action of restoring force, the latch rod 17 returns to the initial position.

The utility model is simple in structure, and durable in use, only needs to press down latch bar 17 or lock hook 6 and can realize self-locking or unlocking function when in use, and is very convenient to use.

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and modifications made within the spirit and principles of the utility model Improvements and the like should all be included within the protection scope of the present utility model.

Claims (10)

1. An automatic latch, comprising a latch box (16) and a latch rod (17) movably mounted on the latch box (16), characterized in that: the outside of the latch box (16) is hinged by a rotating shaft (8) There is a locking hook (6), the axis of the rotating shaft (8) is perpendicular to the longitudinal axis of the latch rod (17), and one end of the locking hook (6) is provided with a hook portion (22), and the locking hook (6) is far away from the locking hook One end of the part (22) is equipped with a first return spring (9) that can be squeezed by the lock hook (6) and the latch box (16), and the rotating shaft (8) is located between the hook part (22) and the first return position. Between the springs (9), the latch box (16) is provided with a guide groove (3), the hook portion (22) of the lock hook (6) extends into the guide groove (3), and the hook portion (22) is provided with The first guide surface (20) and the first limiting surface (7), the latch rod (17) is provided with a limiting block (18), the limiting block (18) is provided with a second limiting surface (19), the second Two limit surfaces (19) can cooperate with the first limit surface (7) so that the hook portion (22) hooks the limit block (18), and the latch lever (17) is sleeved with a button that can push the latch lever ( 17) is the second return spring (12) that is co-extruded by the stop block (18) and the latch box (16), and the second return spring (12) is fixedly connected to the latch at one end away from the stop block (18). on the box (16). the 2. A kind of automatic latch according to claim 1, characterized in that: the guide groove (3) is arranged longitudinally along the latch box (16), and one end of the limit block (18) extends into the guide groove ( 3) inside. the 3. An automatic latch according to claim 1, characterized in that: the limit block (18) is provided with a second guide surface (21) to facilitate its sliding along the first guide surface (20). the 4. An automatic latch according to claim 3, characterized in that: the limit block (18) includes a baffle (14) arranged on the latch rod (17) and a baffle (14) arranged on the baffle (14). The stopper (5), the stopper (5) extends into the guide groove (3), and the second guide surface (21) is arranged on the stopper (5). the 5. An automatic latch according to claim 1, characterized in that: the limit block (18) includes a baffle (14) arranged on the latch rod (17) and a baffle (14) arranged on the baffle (14). The stopper (5), the stopper (5) stretches in the guide groove (3), and the second limiting surface (19) is arranged on the stopper (5). the 6. An automatic latch according to claim 4 or 5, characterized in that the width of the guide groove (3) is slightly larger than the width of the stopper (5). the 7. The automatic latch according to claim 1, characterized in that: the outer side of the latch box (16) is provided with a fixed ear plate (15). the 8. The automatic latch according to claim 1, characterized in that: a handle (1) is provided on the latch lever (17). the 9. The automatic latch according to claim 1, characterized in that: the first guide surface (20) is an inclined surface or an arc surface. the 10. An automatic latch according to claim 1, characterized in that: the latch box (16) comprises a housing (13) and top plates (2) and The bottom plate (10), the guide groove (3) is arranged on the side wall of the casing (13), and the top plate (2) can limit the limit block (18) in the latch box (16). the