Two-section lock

Abstract

The two-section type lockset comprises a shell, a spring bolt, an electromagnet and a limiting device, the spring bolt is connected with the electromagnet through a connecting rod, a spring bolt channel is formed in one side face of the shell, the spring bolt can move in the spring bolt channel, a reset spring is arranged on the connecting rod in a sleeving mode, and the limiting device is connected with the electromagnet. The two ends of the reset spring are connected with the connecting rod and the shell respectively, the connecting rod is further provided with a limiting hole, the limiting hole is located between the spring bolt and the reset spring, the limiting device comprises a limiting rod and a push rod, the two ends of the stroke of the spring bolt are the first position and the second position respectively, the limiting rod is aligned with the limiting hole, and the push rod is located in the limiting hole. The limiting rod can axially move to be inserted into the limiting hole; one end of the push rod is matched with the limiting rod and can drive the limiting rod to move axially, and the other end of the push rod penetrates through the shell and is located outside the shell. The device is simple in structure, can be made into a small-size device, and is particularly suitable for being mounted on an intelligent storage box.

Description

Technical Field

[0001] The invention relates to a lock, in particular to a two-section lock bolt. Background Art

[0002] Existing locks include electronic locks and mechanical locks. Mechanical locks cannot be automatically controlled, while electronic locks require constant power supply to work and are often large in size. In some application scenarios, such as when the smart storage box is small and the cover is not suitable for power supply and electric control system due to size and other reasons, or when the lock needs to be locked quickly and unlocked and kept after power off, existing locks cannot be used. Summary of the invention

[0003] The purpose of the present invention is to improve and innovate at least one disadvantage or problem existing in the background technology, and to provide a lock with simple structure, small size, fast locking and power-off retention after unlocking.

[0004] The technical solution of the present invention is to construct a two-stage lock, including a shell, a lock tongue, an electromagnet and a limit device, wherein the lock tongue is connected to the electromagnet through a connecting rod, a lock tongue channel is provided on one side of the shell, and the lock tongue can move in the lock tongue channel, a reset spring is sleeved on the connecting rod, and the two ends of the reset spring are respectively connected to the connecting rod and the shell, and a limit hole is also provided on the connecting rod, and the limit hole is located between the lock tongue and the reset spring, and the limit device includes a limit rod and a push rod, and the two ends of the travel of the lock tongue are respectively in a first position and a second position, when the lock tongue is in the first position, at least a part of the inclined surface of the lock tongue extends out of the shell, and when the lock tongue is in the second position, the lock tongue is retracted into the shell and has a certain distance from the outer surface of the shell, and the limit rod is aligned with the limit hole, and the limit rod can be axially moved and inserted into the limit hole; one end of the push rod cooperates with the limit rod and can drive the limit rod to move axially, and the other end penetrates the shell and is located outside the shell.

[0005] In one of the embodiments, the limit rod is connected to the shell through a sleeve seat, the limit rod is inserted into the sleeve seat, a second return spring is arranged in the sleeve seat, one end of the second return spring is connected to the end of the limit rod located in the sleeve seat, matching keys and key slots are arranged between the limit rod and the inner wall of the sleeve seat, or the cross-section of the limit rod is rectangular and a corresponding rectangular hole is arranged in the sleeve seat; a sliding rod is arranged on the limit rod, and the sliding rod is perpendicular to the axial direction of the limit rod; the end of the push rod located in the shell cooperates with the sliding rod to enable the limit rod to move axially.

[0006] In one embodiment, the end of the push rod located inside the shell is provided with an inclined surface, and the slide rod is located within the movable range of the inclined surface of the limiting rod; a third return spring is sleeved on the push rod, and the third return spring makes the push rod have a tendency to move outside the shell.

[0007] In one of the embodiments, a notch is provided at the end of the push rod located in the housing, the direction of the notch and the moving direction of the slide rod have a certain angle, and the slide rod is located in the notch.

[0008] In one embodiment, a bearing is sleeved on the sliding rod, and the sliding rod is connected to or contacts the limiting rod through the bearing.

[0009] In one of the embodiments, a limit stopper is further provided in the shell, and a corresponding limit strip is provided on the connecting rod to limit the range of movement of the connecting rod and the locking tongue.

[0010] Advantages and beneficial effects of the present invention: The present invention has a simple structure and can be made into a small-volume device, which is particularly suitable for installation on a smart storage box. The present invention uses a two-stage bolt travel, which can complete locking but cannot unlock when the electric control system is not connected, and can unlock when the electric control system is connected, and manual setting is required to change to a state that allows locking again. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the internal structure of Example 1.

[0012] Figure 2 yes Figure 1 Front view of .

[0013] Figure 3 It is a usage state diagram of the embodiment.

[0014] Figure 4 It is a second usage state diagram of the embodiment.

[0015] Figure 5 It is the third usage state diagram of the embodiment.

[0016] Figure 6 It is a schematic structural diagram of another embodiment.

[0017] Figure 7 It is a structural diagram of yet another embodiment. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is considered to be “disposed on” another element, it may be directly disposed on or connected to the other element or there may be an intermediate element at the same time.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification are only for describing specific implementation purposes and are not intended to limit the present invention. Example 1

[0021] like Figure 1-5 As shown, a two-stage lock comprises a housing 1, a lock tongue 2, an electromagnet 3 and a limiting device, wherein the lock tongue 1 is connected to the electromagnet 3 via a connecting rod 4, a lock tongue channel 5 is provided on one side of the housing 1, and the lock tongue 2 can move in the lock tongue channel 5, a reset spring 6 is sleeved on the connecting rod 4, and the two ends of the reset spring 6 are respectively connected to the connecting rod 4 and the housing 1, and a limiting hole 7 is also provided on the connecting rod 4, and the limiting hole 7 is located between the lock tongue 2 and the reset spring 6, and the limiting device comprises a limiting rod 8 and a push rod 9, and the two ends of the travel of the lock tongue 2 are respectively the first position ( Figure 2 ) and the second position ( Figure 5 ), the bolt 2 is in the first position ( Figure 2 ) when the inclined surface a of the locking tongue 2 extends out of the housing 1, and the locking tongue is in the second position ( Figure 5 ) when the locking tongue 2 is retracted into the shell 1 and is at a certain distance b from the outer surface of the shell 1, and at the same time, the limiting rod 8 is aligned with the limiting hole 7, and the limiting rod 8 can be axially moved to insert into the limiting hole 7; one end of the push rod 9 cooperates with the limiting rod 8 and can drive the limiting rod 8 to move axially, and the other end penetrates the shell 1 and is located outside the shell 1.

[0022] Specifically, in the limiting device, the limiting rod 8 is connected to the housing 1 through the sleeve seat 10, the limiting rod 8 is inserted into the sleeve seat 10, a second return spring 11 is arranged in the sleeve seat 10, one end of the second return spring 11 is connected to the end of the limiting rod 8 located in the sleeve seat 10, and a matching key 12 and key groove 18 are arranged between the limiting rod 8 and the inner wall of the sleeve seat 10. The function of the key 12 and the key groove 18 is to ensure that the limiting rod 8 is axially (i.e. Figure 2-4 The limit rod 8 is provided with a slide bar 13, and the slide bar 13 is perpendicular to the axial direction of the limit rod 8; the end of the push rod 9 located in the housing 1 cooperates with the slide bar 13 to enable the limit rod 8 to move axially.

[0023] In this embodiment, a slope c is provided at the end of the push rod 9 located in the shell 1, and the slide rod 13 is located in the movable range of the slope c of the limiting rod 8, that is, the up and down movement range of the slide rod 13 is within the projection range of the slope c in the vertical direction as shown in the figure; a third return spring 14 is sleeved on the push rod 9, and the third return spring 14 makes the push rod 9 have a tendency to move out of the shell, and a limiting structure 19 is also provided on the push rod 9 to prevent the push rod 9 from excessive outward movement.

[0024] In order to limit the range of motion of the lock tongue 2, the present embodiment provides a second limiting device on the connecting rod 4 and the housing 1, including a left limiting strip 15 and a right limiting strip 16 provided on the connecting rod 4, and a limiting block 17 provided on the housing 1. The lock tongue 2 is in the first position ( Figure 2 ) and the second position ( Figure 5 ), the right limit strip 16 and the left limit strip 15 contact the stopper 17 respectively, limiting the further movement of the lock tongue 2.

[0025] The working principle of Example 1 is as follows.

[0026] When the lock tongue 2 is extended out of the housing 1, the lock tongue 2 changes state in two ways. One is that when the lock body of the present invention moves as a whole, the lock tongue 2 hits the external lock hole, and the edge of the external lock hole squeezes the inclined surface of the lock tongue 2 to force the lock tongue 2 to move into the housing 1. In this way, after the lock tongue 2 is aligned with the external lock hole, the lock tongue 2 pops out under the action of the reset spring 6 and is stuck into the external lock hole to complete the locking. In this process, the limit state of the lock tongue 2 moving to the right is as follows Figure 4 As shown, the limit hole 7 on the connecting rod 4 has not moved to the lower side of the limit rod 8, and the limit rod 8 cannot prevent the lock tongue 2 from popping out. Second, the external control system controls the electromagnet 3 to act, and the lock tongue 2 is pulled into the housing 1 through the connecting rod 4. After the connecting rod 4 moves to the right limit bar 16 and contacts the stopper 17, it stops moving right. At this time, the limit rod 8 moves and inserts into the limit hole 7 under the action of the second return spring 11, and the lock tongue 2 and the connecting rod 4 cannot move any more, and the lock tongue 2 cannot pop out.

[0027] When the limit rod 8 is inserted into the limit hole 7, the lock tongue 2 is completely retracted into the housing 1, which can be changed in the following way. The operator pushes the push rod 9 from outside the housing 1 to move the inclined surface c of the push rod 9 toward Figure 2-4 The left side of the slide bar 13 in the middle of the slide bar 13 is pushed, and the inclined surface c contacts the slide bar 13 of the limit rod 8. The slide bar 13 moves upward under the pressure of the inclined surface c, that is, the limit rod 8 moves upward, and the limit rod 8 is pulled out of the limit hole 7. Without the obstruction of the limit rod 8, the connecting rod moves left under the action of the return spring 6, driving the lock tongue 2 to extend out of the housing 1, and the locking bolt 2 is restored. Figure 2 The state shown in this figure is an intermediate process in the process. Figure 3 After the operator stops the operation, the push rod 9 moves rightward under the action of the third return spring 14, the inclined surface c leaves the slide rod 13, and the limit rod 8 loses the support of the inclined surface c and moves to support the connecting rod 4 under the action of the second return spring 11.

[0028] In the above embodiment, the push rod 9 is kept on the right side under the action of the third return spring 14, ensuring that its inclined surface c does not produce a squeezing effect on the slide rod 13. This technical requirement can also be achieved in other ways. One specific way is as follows Figure 6An oblique notch d is provided at the end of the push rod 9 and the slide rod 13 to replace the inclined surface c, and the slide rod 13 is provided in the notch d. When an external force pushes the push rod 9, the slide rod 13 can move upward along the notch d. After the external force is removed, when the limit rod 8 moves downward together with the slide rod 13, the push rod 9 can be pushed to the right through the notch d. This method can omit the third return spring and the corresponding connection structure.

[0029] In the aforementioned embodiment, the limitation on the right side of the lock tongue 2 is achieved by the cooperation of the right limit strip 16 and the limit block 17, and the limitation on the left side of the lock tongue 2 is achieved by the cooperation of the limit hole 7 and the limit rod 8. The right limit strip 16 in the embodiment also serves as a connection between the reset spring 6 and the connecting rod 4. When the technical solution of the present invention is implemented, a left limit strip can be added to limit the left movement of the lock tongue 2. It can also be achieved by specially configuring the stroke of the movable iron core in the electromagnet, that is, the two ends of the stroke of the iron core correspond to the two ends of the stroke of the lock tongue. This method can omit the structure of the left limit strip, the right limit strip 16 and the limit block 17, and add a conventional structure for connecting the reset spring 6 and the connecting rod 4, such as Figure 7 Of course, other corresponding conventional positioning structures can also be provided on the lock tongue and the corresponding housing (lock tongue channel) to achieve the technical requirements of limiting.

[0030] In order to reduce the resistance when the push rod 4 and the slide rod 13 interact with each other, a bearing may be further provided on the slide rod 13 so that the slide rod 13 is connected or in contact with the push rod 4 through the bearing.

[0031] The aforementioned embodiment provides the key 12 and the keyway 18 to ensure that the limiting rod 8 is axially (i.e. Figure 2-4 In the specific implementation process, other existing methods of preventing rotation can also be used, such as setting the cross section of the limit rod 8 to a rectangular shape, or a rectangular shape with rounded corners, a semicircular shape, or other special shapes, and the corresponding inner cavity of the sleeve seat 10 is also set to a shape consistent with the limit rod 8, which can prevent the limit rod 8 from rotating.

[0032] The present invention realizes that the lock tongue has two strokes through a simple structure, and the devices involved can also be made smaller, which is particularly suitable for smart storage boxes. When installed on the cover of the storage box, the cover itself can be allowed to have no power supply, but the power supply of the box body is turned on after the cover and the storage box are installed, thereby reducing the structural complexity of the cover. There is no power supply in the process of connecting the cover to the box body. The present invention completes the locking of the cover body by squeezing the lock tongue similar to an ordinary latch. When there is power after locking, the lock tongue is retracted into the cover body after obtaining authorization through the control system to complete unlocking. After unlocking, before the cover is removed and the operator pushes the push rod, even if the cover loses the electrical connection with the box body, the lock tongue cannot pop out again, thereby avoiding improper action caused by the lock body losing power at the moment the cover is removed.

[0033] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A two-stage lock, characterized in that: It includes a shell, a lock tongue, an electromagnet and a limit device, wherein the lock tongue is connected to the electromagnet through a connecting rod, a lock tongue channel is provided on one side of the shell, and the lock tongue can move in the lock tongue channel, a reset spring is sleeved on the connecting rod, and the two ends of the reset spring are respectively connected to the connecting rod and the shell, and a limit hole is also provided on the connecting rod, and the limit hole is located between the lock tongue and the reset spring, and the limit device includes a limit rod and a push rod, and the two ends of the travel of the lock tongue are respectively in a first position and a second position, when the lock tongue is in the first position, at least a part of the inclined surface of the lock tongue extends out of the shell, and when the lock tongue is in the second position, the lock tongue is retracted into the shell and has a certain distance from the outer surface of the shell, and the limit rod is aligned with the limit hole, and the limit rod can be axially moved to insert into the limit hole; one end of the push rod cooperates with the limit rod and can drive the limit rod to move axially, and the other end penetrates the shell and is located outside the shell.

2. The two-stage lock according to claim 1, characterized in that: The limit rod is connected to the shell through the sleeve seat, the limit rod is inserted into the sleeve seat, a second return spring is arranged in the sleeve seat, one end of the second return spring is connected to the end of the limit rod located in the sleeve seat, matching keys and key slots are arranged between the limit rod and the inner wall of the sleeve seat, or the cross-section of the limit rod is rectangular and a corresponding rectangular hole is arranged in the sleeve seat; a sliding rod is arranged on the limit rod, and the sliding rod is perpendicular to the axial direction of the limit rod; the end of the push rod located in the shell cooperates with the sliding rod to enable the limit rod to move axially.

3. The two-stage lock according to claim 1, characterized in that: The end of the push rod located in the shell is provided with an inclined surface, and the slide rod is located in the movable range of the inclined surface of the limiting rod; the push rod is sleeved with a third return spring, and the third return spring makes the push rod have a tendency to move out of the shell.

4. The two-stage lock according to claim 1 or 2, characterized in that: The end of the push rod located in the shell is provided with a notch, the direction of the notch and the moving direction of the slide rod have a certain angle, and the slide rod is located in the notch.

5. The two-stage lock according to any one of claims 2 to 4, characterized in that: The sliding rod is sleeved with a bearing, and the sliding rod is connected to or contacts the limiting rod through the bearing.

6. The two-stage lock according to any one of claims 1 to 5, characterized in that: A limit stopper is also arranged in the shell, and a corresponding limit strip is arranged on the connecting rod to limit the movable range of the connecting rod and the locking tongue.

Images