CN210289435U

CN210289435U - Electric control lock for cabinet

Info

Publication number: CN210289435U
Application number: CN201821781384.5U
Authority: CN
Inventors: 贺志兵
Original assignee: Shenzhen Zhilai Science and Technology Co Ltd
Current assignee: Shenzhen Zhilai Science and Technology Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-04-10
Anticipated expiration: 2028-10-31

Abstract

The utility model relates to an electric control lock for a cabinet, which comprises a ratchet wheel, a pawl, an electromagnet assembly and an elastic assembly, wherein the elastic assembly comprises a top rod, the ratchet wheel comprises a plurality of ratchets, and a lock plunger positioning groove is arranged between two adjacent ratchets; the elastic assembly further comprises a shell, a plurality of mounting columns used for mounting the micro switch are arranged on the shell, the mounting columns respectively penetrate through mounting holes which are formed in the micro switch and correspond to the mounting columns, so that the micro switch is fixed, and the micro switch outputs different signals through detecting the state of the ejector rod to indicate the release or locking state of the electric control lock. Implement the utility model discloses an electric control lock for cabinet has following beneficial effect: the installation procedure is simple, no adjustment of the fit between the parts is required and the time consumption is low.

Description

Electric control lock for cabinet

Technical Field

The utility model relates to a tool to lock, more specifically say, relate to an electric control lock for cabinet.

Background

The electric control lock is a mature product, and the electric control lock is also mature in use on a cabinet (such as an intelligent storage cabinet, an intelligent express cabinet or an express box). In some cases, a ratchet and pawl mating structure is also used with existing electrically controlled locks. Simultaneously, because the particularity of cabinet, comparatively pay close attention to the state of cabinet door, also need monitor the cabinet door promptly and in the state of a moment, judge whether it opens the door or closes the door, the state of cabinet door also judges through the state of electric control lock. The common method is to add a microswitch in the electric control lock, and judge the state of the lock according to the state of the switch, so as to obtain the state of the cabinet door. However, in the prior art, the components of the micro switch and other electric control locks are respectively installed in the locks as parts, so that not only are the installation steps complicated, but also the matching problem exists among the parts. Therefore, the electric control lock in the prior art has more manufacturing or installation steps, needs to adjust the position between the parts for matching, and takes longer time.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned installation step of prior art more, need adjustment part cooperation, the longer defect of spending time, provide an installation step less, do not need adjustment part cooperation, spend time shorter an electric control lock for cabinet.

The utility model provides a technical scheme that its technical problem adopted is: constructing an electrically controlled lock for a cabinet, comprising a ratchet for fixing or releasing an external lock bolt, a pawl positionally cooperating with the ratchet to allow the ratchet to rotate freely or to be locked, an electromagnet assembly for dragging the pawl so that the position of the contact part of the pawl with the ratchet changes, and an elastic assembly compressed by the lock bolt when the lock bolt enters between two adjacent ratchet teeth of the ratchet, the elastic assembly comprising a push rod compressed by the lock bolt to retreat when the lock bolt enters between two adjacent ratchet teeth and maintaining the retreated state when the lock bolt is fixed; the ratchet comprises a plurality of ratchets, and a lock bolt positioning groove is formed between every two adjacent ratchets; the ratchet wheel, the ratchet, the electromagnet assembly and the elastic assembly are all arranged on the bottom plate and are positioned in a space formed by the lock shell and the bottom plate; the corresponding positions of the bottom plate and the lock shell are also provided with a lock bolt groove for the lock bolt to enter and guide the lock bolt into the lock bolt positioning groove; the elastic component also comprises a shell, the ejector rod is arranged in the shell, and the elastic component is integrally assembled on the bottom plate through the shell; the shell is provided with a plurality of mounting columns for mounting the micro switch, the mounting columns respectively penetrate through mounting holes which are formed in the micro switch and correspond to the mounting columns, so that the micro switch is fixed, and the micro switch outputs different signals by detecting the state of the ejector rod to indicate the release or locking state of the electric control lock.

Furthermore, a pressing block is arranged at one end of the ejector rod, extends out of the surface of the shell through a through hole formed in the shell, contacts with a button of the microswitch when the ejector rod extends out, and leaves the microswitch button when the ejector rod retreats.

Furthermore, the housing is also provided with a positioning column which is arranged along the outer contour of the micro switch, so that the micro switch is fixed in the housing and cannot move.

Furthermore, the elastic component also comprises a top rod spring sleeved on the top rod, and the top rod spring is compressed when the top rod retreats.

Furthermore, the pawl comprises a pawl body and an emergency connecting rod, one end of the pawl body is in contact with the ratchet, the other end of the pawl body is connected with one end of the emergency connecting rod, and one end of the emergency connecting rod extends out of the electric control lock through an emergency through hole formed in the lock shell; the middle part of the pawl body is fixed on the bottom plate through a pawl rotating pin shaft.

Still further, the pawl further includes a return torsion spring provided on the pawl body such that the pawl fixes its position when in contact with the ratchet teeth by cooperating with a side wall of the lock housing.

Furthermore, the ratchet wheel comprises five ratchets with the same interval angle, and a lock bolt positioning groove which is sunken towards the center of the ratchet wheel and is matched with the external dimension of the lock bolt is arranged in the middle of two adjacent ratchets; the ratchet wheel is fixed on the bottom plate through a rotating pin shaft which passes through the center of the ratchet wheel and rotates in a single direction.

Further, a shape of a chamfer of a contact portion of the ratchet teeth and the pawl is provided along a tangent of a rotation direction of the pawl.

Still further, the electromagnet assembly comprises a coil, an iron core and a tower spring; the tower-shaped spring is sleeved on the iron core and arranged in the coil; when the coil is electrified, the iron core retracts towards the coil direction under the action of current flowing through the coil; when the coil is powered off, the iron core is reset under the action of the tower-shaped spring.

Furthermore, the electromagnet assembly further comprises a connecting mechanism arranged at one end of the iron core, and the emergency connecting rod penetrates through the connecting mechanism, so that the pawl rotates by taking the pawl rotating pin shaft as a shaft when the iron core moves.

Implement the utility model discloses an electric control lock for cabinet has following beneficial effect: owing to adopt elastic component, and be provided with the reference column on the elastic component, at first elastic component's installation itself is just comparatively simple, through the fix with screw on the bottom plate can, simultaneously, after elastic component installs, cup joint micro-gap switch on above-mentioned reference column and fix on above-mentioned elastic component can. Therefore, the mounting step is simple, the fitting between the components does not need to be adjusted, and the time cost is less.

Drawings

Fig. 1 is a schematic structural diagram of an electric control lock in an embodiment of the electric control lock for a cabinet of the present invention;

FIG. 2 is a schematic diagram showing the positions of the components of the electric control lock in the locking state in the embodiment;

fig. 3 is a schematic position diagram of the components of the electrically controlled lock in an unlocked state in the embodiment.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

As shown in fig. 1, 2 and 3, in an embodiment of the electric control lock for a cabinet of the present invention, the electric control lock for a cabinet includes a ratchet 1 for fixing or releasing an external lock bolt 9 (in this embodiment, the lock bolt 9 is not a component of the electric control lock, and is installed outside the electric control lock, and cooperates with the electric control lock to achieve a door locking action or function), a pawl 2 which cooperates with the ratchet 1 in position to enable the ratchet 1 to rotate freely or to be locked, an electromagnet assembly 5 which drags the pawl 2 to change the position of a contact part with the ratchet 1, and an elastic assembly 3 which is compressed by the lock bolt 9 when the lock bolt 9 enters between two adjacent ratchet teeth 11 of the ratchet 1, wherein the elastic assembly 3 includes a top bar 31, and the top bar 31 is compressed by the lock bolt 9 through the rotation of the ratchet 1 when the lock bolt 9 enters between two adjacent ratchet teeth 11 and retreats when the lock bolt 9 is fixed Maintaining said retracted state; the ratchet 1 comprises a plurality of ratchets 11, and a lock bolt positioning groove 12 is arranged between every two adjacent ratchets 11; the ratchet 1, the ratchet 2, the electromagnet assembly 5 and the elastic assembly 3 are all arranged on the bottom plate 7 and are positioned in a space formed by a lock shell (the lock shell is not shown in the figure, only the side wall 61 of the lock shell is shown) and the bottom plate 7; the corresponding positions of the bottom plate 7 and the lock shell are also provided with a lock bolt groove 71 for the lock bolt 9 to enter and guide into the lock bolt positioning groove 11; the elastic component 3 further comprises a housing, the ejector rod 31 is arranged in the housing, and the elastic component 3 is integrally assembled on the bottom plate 7 through the housing; the housing is provided with a plurality of mounting posts 33 for mounting a microswitch, the mounting posts 33 respectively penetrate through mounting holes (namely, the positions of the mounting posts 33 in fig. 1) arranged on the microswitch 4 and corresponding to the mounting posts 33, so that the microswitch 4 is fixed, and the microswitch 4 outputs different signals by detecting the state of the ejector rod 31 to represent the release or locking state of the electric control lock, thereby representing the opening and closing state of the cabinet door. Specifically, in this embodiment, one end (the end far from the ratchet wheel or the end arranged in the housing of the elastic component 3) of the ejector 33 is provided with a pressing block 32, the pressing block 32 protrudes out of the surface of the housing through a through hole 34 arranged on the housing, and contacts with the button of the microswitch 4 when the ejector 31 protrudes (i.e. the ratchet wheel 1 is released, the ejector 31 pushes the lock bolt 9 outwards, see fig. 3, i.e. when the electric control lock is unlocked or the cabinet door is opened), and leaves the button of the microswitch 4 when the ejector 31 retreats (i.e. the lock bolt 9 pushes or compresses the ejector 31, see fig. 2, i.e. when the electric control lock is locked or the cabinet door is closed).

In addition, in the present embodiment, a positioning column (not shown in the figure) is further disposed on the housing, and the positioning column is disposed along the outer contour of the micro switch 4, so that the micro switch 4 is fixed therein and cannot move. In essence, the positioning column is a supplement of the mounting column 33, and ensures that the micro switch 4 does not move when the external force is large, on one hand, the micro switch 4 is further fixed, and on the other hand, the mounting column 33 is also ensured not to be damaged due to the external force to a certain extent. In some cases, the positioning post may be a cylindrical body or an intermittent protrusion protruding from the surface of the housing and conforming to the outer contour of the microswitch 4.

In addition, in this embodiment, referring to fig. 3, the elastic assembly, 3 further includes a post spring 35 sleeved on the post 31, the post 31 compresses the post spring 35 when retreating, that is, when the door is locked or closed, the post spring 35 is compressed, and due to the fixation of the ratchet 1 to the lock bolt 9, the compression of the post spring 35 is maintained; when the door is opened, the ratchet wheel 1 is released, the ratchet wheel 1 rotates to eject the lock bolt 9, the lock bolt 9 exits the lock bolt groove 71 and exits the electric control lock, and then the opening of the cabinet door is realized.

As shown in fig. 1, in this embodiment, the pawl 2 includes a pawl body 21 and an emergency connecting rod 22, one end of the pawl body 21 (the left end of the pawl body 21 in fig. 1) contacts with the ratchet 11, the other end (the right end of the pawl body 21 in fig. 1) is connected with one end of the emergency connecting rod 22, and the other end of the emergency connecting rod 22 extends out of the electric control lock through an emergency through hole 62 provided on the lock housing; the middle part of the pawl body 21 is fixed on the bottom plate 7 through a pawl rotating pin shaft 23. The pawl 2 further includes a return torsion spring 24 provided on the pawl body 21 such that the pawl body 21 fixes the position of the pawl body 21 when contacting the ratchet teeth 11 by engaging with the side wall 61 of the lock housing. The existence of the reset torsion spring 24 enables the pawl body 21 to be acted by the reset torsion spring 24 when contacting with the ratchet 11, and the external impact causes the pawl body 21 to shake or leave from the designed position, so that the acting force of the reset torsion spring 24 needs to be overcome, and from the data obtained in practice, the force transmitted to the pawl 2 by the impact cannot overcome the acting force of the reset torsion spring 24 basically, so that the pawl 2 cannot be moved basically, and the impact resistance of the electric control lock is greatly improved.

In addition, the ratchet 1 comprises five ratchets 11 with the same interval angle (namely, the five ratchets 11 are uniformly distributed on the circumference of 360 degrees), and a lock bolt positioning groove 12 which is concave towards the center of the ratchet 1 and is matched with the external dimension of the lock bolt 9 is arranged at the middle position of two adjacent ratchets 11; the ratchet 1 is fixed on the bottom plate 7 through a rotating pin shaft 13 which passes through the center position of the ratchet and rotates in one direction. Meanwhile, the shape of the corner cut of the contact portion of the ratchet teeth 11 with the pawl 2 (actually, one end of the pawl body 21) is arranged along the tangent line of the rotation direction of the pawl 2. This arrangement makes it possible to fix the ratchet 1 without a large frictional force occurring when the pawl 2 is disengaged, even if the pawl 2 is disengaged from the ratchet 1.

In this embodiment, referring to fig. 1 and fig. 2, the electromagnet assembly, 5, includes a coil 51, an iron core 52 and a tower spring 53; the tower-shaped spring 53 is sleeved on the iron core 52 and is arranged in the coil 51; when the coil 51 is energized, the iron core 52 retracts toward the coil 51 under the action of the current flowing through the coil 51; when the coil 51 is de-energized, the iron core 52 is reset by the tower spring 53 (see the position of the iron core 52 in fig. 2 and 3). And a connecting mechanism 54 at one end of the plunger 42, wherein the emergency link 22 passes through the connecting mechanism 54, so that the pawl 2 rotates around the pawl rotating pin shaft 23 when the plunger 52 moves, thereby disengaging from or abutting against the ratchet 11.

In general, in the present embodiment, the ratchet 1 is designed as five teeth, and the teeth thereof form parallel spaces in the locked position of the bolt 9 (see the positions and interrelationships of the bolt grooves and the bolt positioning grooves in fig. 1). The function is as follows: due to manufacturing errors, when the actual position of the lock bolt 9 changes along the parallel space, the vertical position of the lock bolt 9 keeps unchanged, and the locking position of the door is also ensured to be unchanged, so that the position accuracy of the door in locking is ensured; the lock box (comprising the bottom plate 7 and the lock shell) is provided with a lock box slot (namely a lock bolt slot) along the entering direction of the lock bolt 9, the slot and the space parallel to the ratchet 1 form a closed space, and when the cabinet door is closed, the lock bolt 9 is limited in the closed space. The function is as follows: when the lock bolt is deformed by the outward pulling force, the lock bolt can not slide out of the parallel space of the ratchet wheel.

In this embodiment, the ratchet-pawl mechanism is a mechanism that blocks the ratchet 1 by the pawl 2 and limits the ratchet 1 to rotate only in one direction, and the ratchet 1 can rotate arbitrarily by releasing the blocking of the pawl 2 to the ratchet 1. Because the tangential angle of the top end of the ratchet wheel is designed according to the tangential direction of the rotation of the pawl, the minimum friction resistance of the pawl when the pawl is disengaged from the ratchet wheel is ensured, and meanwhile, the sufficient friction angle can be ensured when the pawl is engaged with the ratchet wheel to prevent the pawl from being disengaged.

The return of the pawl 2 is effected by a return torsion spring 24. When the electromagnet assembly 5 is powered off, the pawl is reset by the reset torsion spring 24, and the pawl 2 is parallel to the lock box. The ratchet 1 can be rotated counterclockwise. The advantages of using the ratchet 1 are as follows: the lock hook does not enter the lock body, and the self-locking phenomenon can not occur; when the lock body vibrates, the pawl 2 is subjected to the resistance of the torsion spring, the pawl 2 is difficult to swing, the vibration and impact resistance of the lock body are increased, and the arrangement performance of the lock is greatly improved.

In addition, in this embodiment, a door opening spring device (elastic component) is designed in the lock box, a compression spring (push rod spring) is mounted on the push rod 31, a micro switch 4 is configured on the upper portion of the spring device, and the micro switch 4 is fixed in a pin shaft clamping manner. When the door is closed, the lock bolt 9 on the door presses the ejector rod to move backwards, and the reed of the microswitch 4 is touched, so that the state (on or off) of the microswitch 4 is changed, and the control system can judge whether the cabinet door is closed or not. When the door is opened, the electromagnet assembly 5 is electrified, the ratchet wheel 1 is separated from the blocking of the pawl instantly, and due to the elastic action of the ejector rod, the ratchet wheel 1 rotates clockwise, the lock bolt 9 is ejected, and the door is opened. When the electromagnet assembly 5 is powered off, the free state is restored.

When the lockset cannot be electrified or the electromagnet assembly 5 fails, the cabinet door does not need to be damaged, and the emergency connecting rod 22 can be adopted for opening the door in an emergency.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An electrically controlled lock for a cabinet, comprising a ratchet for fixing or releasing an external lock bolt, a pawl positionally cooperating with the ratchet to allow the ratchet to rotate freely or to be locked, an electromagnet assembly for dragging the pawl to change the position of a contact part with the ratchet, and an elastic assembly compressed by the lock bolt when the lock bolt enters between two adjacent ratchet teeth of the ratchet, wherein the elastic assembly comprises a push rod compressed by the lock bolt to retreat when the lock bolt enters between two adjacent ratchet teeth and maintaining the retreated state when the lock bolt is fixed; the ratchet comprises a plurality of ratchets, and a lock bolt positioning groove is formed between every two adjacent ratchets; the ratchet wheel, the ratchet, the electromagnet assembly and the elastic assembly are all arranged on the bottom plate and are positioned in a space formed by the lock shell and the bottom plate; the corresponding positions of the bottom plate and the lock shell are also provided with a lock bolt groove for the lock bolt to enter and guide the lock bolt into the lock bolt positioning groove; the elastic component also comprises a shell, the ejector rod is arranged in the shell, and the elastic component is integrally assembled on the bottom plate through the shell; the shell is provided with a plurality of mounting columns for mounting the micro switch, the mounting columns respectively penetrate through mounting holes which are formed in the micro switch and correspond to the mounting columns, so that the micro switch is fixed, and the micro switch outputs different signals by detecting the state of the ejector rod to indicate the release or locking state of the electric control lock.

2. An electric control lock for cabinets according to claim 1, wherein said push rod is provided at one end with a pressing block, said pressing block protrudes out of the surface of said casing through a through hole provided on said casing and contacts with the push button of said micro switch when said push rod is protruded and leaves said micro switch push button when said push rod is retreated.

3. An electrically controlled lock for cabinets according to claim 2, wherein a positioning column is further provided on said outer casing, said positioning column being arranged along the outer contour of said micro switch such that said micro switch is fixed immovably therein.

4. An electrically controlled lock for cabinets according to claim 3, wherein said elastic member further comprises a push rod spring fitted over said push rod, said push rod spring being compressed when said push rod is retracted.

5. An electric control lock for cabinets as claimed in claim 4, wherein said pawl comprises a pawl body and an emergency connecting rod, one end of said pawl body is in contact with said ratchet and the other end thereof is connected with one end of said emergency connecting rod, one end of said emergency connecting rod is extended out of said electric control lock through an emergency through hole provided on said lock housing; the middle part of the pawl body is fixed on the bottom plate through a pawl rotating pin shaft.

6. An electrically controlled lock for a cabinet according to claim 5, wherein the pawl further comprises a return torsion spring provided on the pawl body for securing a position of the pawl when contacting the ratchet teeth by engaging with a side wall of the lock housing.

7. An electrically controlled lock for cabinets according to claim 6, wherein the ratchet wheel comprises five ratchet teeth with same interval angle, and a lock bolt positioning groove which is concave towards the center of the ratchet wheel and is matched with the external dimension of the lock bolt is arranged at the middle position of two adjacent ratchet teeth; the ratchet wheel is fixed on the bottom plate through a rotating pin shaft which passes through the center of the ratchet wheel and rotates in a single direction.

8. An electrically controlled lock for cabinets according to claim 7, wherein a tangential shape of a contact portion of the ratchet teeth and the pawl is provided along a tangent of a rotation direction of the pawl.

9. An electrically controlled lock for cabinets according to claim 8, wherein the electromagnet assembly comprises a coil, an iron core and a tower spring; the tower-shaped spring is sleeved on the iron core and arranged in the coil; when the coil is electrified, the iron core retracts towards the coil direction under the action of current flowing through the coil; when the coil is powered off, the iron core is reset under the action of the tower-shaped spring.

10. An electrically controlled lock for cabinets according to claim 9, wherein said electromagnet assembly further comprises a connecting mechanism provided at one end of said core, said emergency connecting rod passing through said connecting mechanism so that said pawl rotates about a pawl pivot axis when said core moves.