CN211736732U

CN211736732U - Clutch assembly and lock

Info

Publication number: CN211736732U
Application number: CN201921947522.7U
Authority: CN
Inventors: 黄沃钢
Original assignee: Zhongshan Demi Intelligent Technology Co ltd
Current assignee: Zhongmingniao Technology (Zhongshan) Co.,Ltd.
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-10-23
Anticipated expiration: 2029-11-12

Abstract

The utility model discloses a clutch assembly to a tool to lock with this clutch assembly is disclosed, wherein clutch assembly includes: a base; a clutch arranged on the base is rotated, and a clutch control switch is arranged on the clutch; the driving mechanism is arranged on the base; the clutch shifting piece is pivoted on the base and connected with the clutch control switch, the clutch shifting piece can swing to drive the clutch control switch to move, the clutch shifting piece is connected with the driving mechanism, and the driving mechanism can drive the clutch shifting piece to swing. Through setting up a separation and reunion plectrum, by actuating mechanism drive separation and reunion plectrum swing, and then drive separation and reunion control switch and remove and control the clutch, separation and reunion plectrum rigidity intensity is great, at long-time separation and reunion in-process, can effectively reduce fatigue deformation, improves transmission precision, reinforcing separation and reunion reliability. The lock adopting the clutch assembly improves the reliability of the lock to be opened and closed, and prolongs the service life of the lock.

Description

Clutch assembly and lock

Technical Field

The utility model relates to a tool to lock technical field, in particular to clutch assembly and tool to lock that has it.

Background

The lockset is widely applied to daily life of people, has a history of thousands of years, and has higher requirements on the safety and reliability of the lockset along with the continuous improvement of the social living standard.

In the prior art, a clutch assembly of a lock is driven by a worm gear and a worm, a worm is arranged on a rotating shaft of a motor, a steel wire is arranged on the worm gear, one end of the steel wire is fixed on the worm gear, and the other end of the steel wire is connected with a clutch control switch of a clutch. When the motor drives, the worm and the gear are driven, the worm gear rotates to enable the steel wire to swing, and then the clutch control switch is driven to move to control the clutch to be in clutch. The steel wire is slender strip among this kind of structure, and rigidity intensity is little, and at the long-time separation and reunion in-process of clutch assembly, the steel wire easily takes place fatigue deformation, influences the transmission precision and leads to the transmission not in place even, and clutch assembly reliability is lower this moment, and the life of tool to lock is shorter.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a clutch assembly can improve the transmission precision, reinforcing separation and reunion reliability.

The utility model discloses still provide a tool to lock that has above-mentioned clutch assembly, can improve switch lock reliability, increase of service life.

According to the utility model discloses a clutch assembly of first aspect embodiment, including the base; the clutch is rotatably arranged on the base, and a clutch control switch is arranged on the clutch; the driving mechanism is arranged on the base; the clutch shifting piece is pivoted on the base and connected with the clutch control switch, the clutch shifting piece can swing to drive the clutch control switch to move, the clutch shifting piece is connected with the driving mechanism, and the driving mechanism can drive the clutch shifting piece to swing.

According to the utility model discloses clutch assembly has following beneficial effect at least: through setting up a separation and reunion plectrum, by actuating mechanism drive separation and reunion plectrum swing, and then drive separation and reunion control switch and remove and control the clutch, separation and reunion plectrum rigidity intensity is great, at long-time separation and reunion in-process, can effectively reduce fatigue deformation, improves transmission precision, reinforcing separation and reunion reliability.

According to the utility model discloses a some embodiments still include at least one connecting piece, the connecting piece is established on the separation and reunion plectrum, the separation and reunion plectrum passes through the connecting piece with actuating mechanism is connected, actuating mechanism can drive the connecting piece drives the swing of separation and reunion plectrum. The connecting piece is arranged to reduce the abrasion degree of the clutch shifting piece, so that parts are more convenient to replace, and the cost is lower.

According to some embodiments of the utility model, be equipped with the spout on the separation and reunion control switch, at least part embedding on the separation and reunion plectrum in the spout, separation and reunion control switch can along the separation and reunion plectrum slides, the swing of separation and reunion plectrum can drive separation and reunion control switch reciprocating motion. The clutch can rotate smoothly and effectively clutch.

According to some embodiments of the utility model, be equipped with first segmental arc on the separation and reunion plectrum, first segmental arc at least part imbeds in the spout, clutch control switch can along first segmental arc slides. The first arc-shaped section can give way to a rotating path of the clutch in the unlocking process, so that the clutch is prevented from being locked, and meanwhile, the clutch control switch cannot generate misoperation.

According to some embodiments of the present invention, the clutch control switch is a plug, the clutch further includes a first control seat, a core seat, a second control seat and a gear seat rotatably sleeved together, the first control seat, the core seat and the gear seat can rotate synchronously in at least one direction, the core seat is provided with a slot into which the plug can be inserted, the clutch dial plate swings to drive the plug to be inserted into or pulled out of the slot, and when the plug is inserted into the slot, the second control seat can rotate synchronously with the first control seat, the core seat and the gear seat; when the bolt is pulled out from the slot, the second control seat does not synchronously rotate with the first control seat, the core seat and the gear seat. Through the insertion and the pulling-out of the plug pin, the clutch can be simply and effectively controlled to be clutched, and meanwhile, the clutch can also be accurately positioned.

According to the utility model discloses a few embodiments, actuating mechanism includes the motor, be equipped with the screw rod in the pivot of motor, the one end of connecting piece can with the thread tooth joint of screw rod. The connecting piece is driven by the screw rod, so that the structure is simple and the transmission is effective.

According to the utility model discloses a few embodiments, the connecting piece is a torsional spring, be equipped with first linking arm and second linking arm on the torsional spring, first linking arm can with the thread tooth joint of screw rod, the second linking arm is fixed on the separation and reunion plectrum. The torsional spring has elasticity, can avoid appearing collapsing when the rigidity transmission is unusual, and the reliability is stronger.

According to some embodiments of the utility model, be equipped with on the base and restrict the limit structure of separation and reunion plectrum amplitude of oscillation. The connecting piece can be prevented from dropping out of the range of the thread teeth of the screw rod and being incapable of reciprocating motion, and meanwhile, the clutch shifting piece is ensured to drive the clutch control switch to move in place.

According to some embodiments of the present invention, the limiting structure comprises a limiting cylinder and/or a travel switch, the limiting cylinder is disposed at the rear side of the clutch plectrum, and the clutch plectrum is contacted with the limiting cylinder when swinging backwards to the maximum angle; the travel switch is arranged on the rear side of the clutch shifting piece, and the clutch shifting piece is contacted with the travel switch when swinging backwards to the maximum angle. The connecting piece can be prevented from dropping out of the range of the thread teeth of the screw rod and being incapable of reciprocating motion, the clutch shifting piece is ensured to drive the clutch control switch to move to the position, and the driving state of the driving mechanism can be controlled through electronic signals.

According to the utility model discloses a tool to lock of second aspect embodiment, include according to the utility model discloses the clutch assembly of above-mentioned first aspect embodiment.

According to the utility model discloses tool to lock has following beneficial effect at least: by adopting the clutch assembly, the reliability of the lock to be opened and closed is improved, and the service life of the lock is prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a lock structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of a lock structure according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a clutch assembly according to an embodiment of the present invention;

fig. 4 is an exploded view of the clutch assembly according to the embodiment of the present invention;

fig. 5 is an exploded view of a clutch according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a clutch shift plate according to an embodiment of the present invention;

fig. 7 is a schematic view of an idle state of a clutch assembly according to an embodiment of the present invention;

fig. 8 is a schematic view of a clutch assembly linkage state according to an embodiment of the present invention;

fig. 9 is a schematic view of an unlocking state of the clutch assembly according to the embodiment of the present invention;

FIG. 10 is a schematic structural view of the clutch assembly of the embodiment of the present invention without the base and the clutch;

FIG. 11 is an enlarged view of a portion of FIG. 10 at A;

fig. 12 is a schematic structural diagram of a connecting member according to an embodiment of the present invention.

Reference numerals:

base 100, clutch 200, driving mechanism 300, clutch plectrum 400, connecting piece 500, travel switch 600,

A limit cylinder 110, a clutch control switch 210, a first control seat 220, a core seat 230, a second control seat 240, a gear seat 250, a motor 310, a screw 320, a slotted elongated hole 410, a first arc-shaped section 420, a positioning boss 430, a step angle 440, a second arc-shaped section 450, a first connecting arm 510, a second connecting arm 520, a first gear, a second gear, a,

The sliding groove 211, the insertion groove 231, the abutting portion 232, the hook-shaped end portion 521, and the spiral root portion 522.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Embodiments of the first aspect of the present invention provide a clutch assembly, including a base 100; the clutch 200 is rotatably arranged on the base 100, and a clutch control switch 210 is arranged on the clutch 200; a driving mechanism 300 provided on the base 100; the clutch shifting piece 400 is pivoted on the base 100, the clutch shifting piece 400 is connected with the clutch control switch 210, the clutch shifting piece 400 swings to drive the clutch control switch 210 to move, the clutch shifting piece 400 is connected with the driving mechanism 300, and the driving mechanism 300 can drive the clutch shifting piece 400 to swing. Through setting up a separation and reunion plectrum, by actuating mechanism drive separation and reunion plectrum swing, and then drive separation and reunion control switch and remove and control the clutch, separation and reunion plectrum rigidity intensity is great, at long-time separation and reunion in-process, can effectively reduce fatigue deformation, improves transmission precision, reinforcing separation and reunion reliability.

In some embodiments of the present invention, at least a portion of the clutch operating member 400 is connected to the driving mechanism 300, and the portion is integrally formed with the clutch operating member 400, and the portion may be configured as a long strip-shaped protrusion or a hook-shaped protrusion, which is not limited herein.

In some embodiments of the present invention, the clutch device further includes at least one connecting member 500, the connecting member 500 is disposed on the clutch plate 400, the clutch plate 400 is connected to the driving mechanism 300 through the connecting member 500, and the driving mechanism 300 can drive the connecting member 500 to drive the clutch plate 400 to swing. Referring to fig. 3 and 4, by arranging the connecting piece 500, the connecting piece 500 which is more seriously worn is only needed to be replaced after the clutch assembly is clutched for multiple times, so that the wear degree of the clutch plectrum 400 is reduced, the parts are more conveniently replaced, and the cost is lower.

In some embodiments of the present invention, the clutch control switch 210 is provided with a sliding groove 211, the clutch plate 400 is at least partially embedded into the sliding groove 211, the clutch control switch 210 can slide along the clutch plate 400, and the clutch plate 400 swings to drive the clutch control switch 210 to reciprocate. For example, referring to fig. 3 to 6, the sliding slots 211 are respectively disposed at the upper and lower portions of the clutch control switch 210, the clutch plate 400 is provided with a slot 410, the slot 410 divides the clutch plate 400 into an upper portion and a lower portion, the upper portion and the lower portion of the clutch plate 400 are respectively embedded into the slots 211 of the upper and lower portions of the plug pin, the clutch control switch 210 can slide along the slot 410 through the sliding slot 211, and the clutch plate 400 can push the clutch control switch 210 to reciprocate by partially embedding into the sliding slot 211 when swinging, so that the clutch 200 can be effectively clutched.

It is conceivable that a sliding groove may be disposed on the clutch dial 400, and a protrusion is correspondingly disposed on the clutch control switch 210, and the protrusion is embedded in the sliding groove, and may also perform an effect of effectively pushing and pulling the clutch control switch 210, which is not limited herein.

In some embodiments of the present invention, the clutch plate 400 is provided with a first arc-shaped section 420, the first arc-shaped section 420 is at least partially embedded in the sliding groove 211, and the clutch control switch 210 can slide along the first arc-shaped section 420. For example, referring to fig. 3 to 6, at this time, the radian of the first arc-shaped segment 420 corresponds to the rotation angle of the clutch 200, and when the clutch assembly is changed from the linkage state to the unlocking state due to the design of the first arc-shaped segment 420, the rotation path of the clutch 200 during the unlocking process can be abducted, so that the clutch 200 and the clutch dial 400 are prevented from being interfered and locked, and the clutch control switch 210 does not malfunction.

In some embodiments of the present invention, the clutch control switch 210 is a plug, the clutch 200 further includes a first control seat 220, a core seat 230, a second control seat 240 and a gear seat 250 rotatably sleeved together, the first control seat 220, the core seat 230 and the gear seat 250 can rotate synchronously in at least one direction, the core seat 230 is provided with a slot 231 for the plug to insert, the clutch dial 400 swings to drive the plug to insert into the slot 231 or pull out from the slot 231, when the plug is inserted into the slot 231, the second control seat 240 can rotate synchronously with the first control seat 220, the core seat 230 and the gear seat 250; when the latch is pulled out of the slot 231, the second control socket 240 does not rotate synchronously with the first control socket 220, the core socket 230 and the gear socket 250. For example, referring to fig. 3 to 5, the clutch control switch 210 is a plug pin disposed at the rear end of the clutch 200, the forward and backward swing of the clutch plate 400 drives the plug pin 210 to perform a reciprocating motion of inserting and pulling, the second control seat 240 is connected to an external control switch, and the gear seat 250 is connected to other transmission mechanisms outside the clutch assembly. When the clutch plectrum 400 swings forwards, the plug pin is driven to be inserted, at the moment, the second control seat 240, the first control seat 220, the core print 230 and the gear seat 250 can synchronously rotate, the clutch 200 is in a linkage state, at the moment, the second control seat 240 is rotated through an external control switch, the second control seat 240 can be abutted to the plug pin, the plug pin is abutted to the side wall of the slot 231 of the core print 230, the core print 230 is driven to synchronously rotate, and the core print 230 is provided with an abutting part 232 which is abutted to the gear seat 250, so that the gear seat 250 can be driven to rotate at last, and other transmission mechanisms can be driven to transmit; when the clutch driving plate 400 swings backwards, the plug pin is driven to be pulled out, at this time, the second control seat 240 does not synchronously rotate with the first control seat 220, the core print 230 and the gear seat, the clutch 200 is in an idle rotation state, at this time, the second control seat 240 is separated from the plug pin, when the second control seat 240 is rotated through the external control switch, the second control seat 240 idles, the gear seat 250 does not synchronously rotate, and other transmission mechanisms cannot perform transmission. Referring to fig. 7, clutch paddle 400 swings back to pull the plug pin out, and the clutch assembly is in an idle state. Referring to fig. 8, clutch plate 400 is swung forward to insert plug 210, and the clutch assembly is in a coupled state. Referring to fig. 9, the entire clutch 200 is rotated by the rotation of the external control switch, and the clutch assembly is in an unlocked state. Through the insertion and the pulling-out of the plug pin, the clutch 200 can be simply and effectively controlled to be on and off, and meanwhile, the clutch can also be accurately in place.

In some embodiments of the present invention, the driving mechanism 300 includes a motor 310, a screw 320 is disposed on the shaft of the motor 310, and one end of the connecting member 500 can be engaged with the thread of the screw 320. For example, referring to fig. 10 and 11, when the motor 310 is powered on, the screw 320 rotates, and the thread teeth of the screw 320 push the connecting member 500 clamped thereon to reciprocate along the axial direction of the screw 320 as the screw 320 rotates, so that the connecting member 500 is driven by the screw 320, and the structure is simple and the transmission is effective.

In some embodiments of the present invention, the connecting member 500 is a torsion spring, the torsion spring is provided with a first connecting arm 510 and a second connecting arm 520, the first connecting arm 510 is connected to the screw teeth of the screw 320, and the second connecting arm 520 is fixed on the clutch plate 400. For example, referring to fig. 10 and 11, the torsion spring is clamped to the thread teeth of the screw 320 through the first connecting arm 510 and fixed to the clutch plate 400 through the second connecting arm 520, when the screw 320 rotates, the thread teeth of the screw 320 rotate along with the screw 320 to push the first connecting arm 510 clamped thereto to move, and then the connecting member 500 is driven to move, and the torsion spring is elastic, so that the rigid member is prevented from collapsing when the rigid member is abnormally driven, and the reliability is higher.

In some embodiments of the present invention, the second connecting arm 520 is provided with a hook-shaped end 521 and a spiral root 522, the clutch plate 400 is provided with a positioning boss 430 and a step angle 440, the hook-shaped end 521 is hooked with the step angle 440, and the spiral root 522 is wound around the positioning boss 430. For example, referring to fig. 10 to 12, by the double positioning and fixing of the hook-shaped end 521 and the spiral root 522, the reliable connection between the connecting member 500 and the clutch dial 400 is enhanced, so that when driven by the driving mechanism 300, the connecting member 500 drives the clutch dial 400 to swing more accurately and synchronously, with higher precision and more reliable transmission.

In some embodiments of the present invention, the base 100 is provided with a limiting structure capable of limiting the swing range of the clutch plate 400. The connecting member 500 is prevented from being out of the range of the thread teeth of the screw 320 and being unable to reciprocate, and the clutch driving plate 400 is ensured to drive the clutch control switch 210 to move in place.

In some embodiments of the present invention, the limiting structure includes a limiting cylinder 110 and/or a travel switch 600, the limiting cylinder 110 is disposed at the rear side of the clutch shift plate 400, and the clutch shift plate 400 swings backwards to the maximum angle and contacts with the limiting cylinder 110; the stroke switch 600 is provided at the rear side of the clutch dial 400, and the clutch dial 400 is contacted with the stroke switch 600 when it swings backward to a maximum angle. For example, referring to fig. 3 and 4, the limiting cylinder 110 is disposed at the rear side of the clutch dial 400 to directly limit the maximum angle of the clutch dial 400; the travel switch 600 is also arranged at the rear side of the clutch plectrum 400, when the clutch plectrum 400 swings backwards to contact with the travel switch 600, the travel switch 600 can send out electronic signals to control the forward and reverse rotation of the motor 310, and further the forward and reverse rotation of the screw 320 drives the reciprocating motion of the connecting piece 500, and finally the purpose of changing the swing direction of the clutch plectrum 400 is achieved. The limiting cylinder 110 and/or the travel switch 600 can prevent the connecting piece 500 from falling out of the range of the thread teeth of the screw 320 and being incapable of reciprocating, and simultaneously ensure that the clutch plectrum 400 drives the clutch control switch 210 to move in place, and can control the driving state of the driving mechanism 300 through electronic signals.

In some embodiments of the present invention, referring to fig. 3, 4, and 6, the position of the clutch plate 400 corresponding to the limiting cylinder 110 is provided with a second arc-shaped section 450, the concave surface of the second arc-shaped section 450 faces the limiting cylinder 110, and the second arc-shaped section 450 is provided to enable the concave surface of the second arc-shaped section 450 to contact with the limiting cylinder 110 when the clutch plate 400 swings backwards to the farthest position, so that the area of the contact surface is larger, and the noise generated in the collision process is smaller.

The embodiment of the second aspect of the utility model provides a lock, including any of the above-mentioned the utility model provides a clutch assembly. Referring to fig. 1 and 2, by adopting the clutch assembly, the reliability of the lock is improved, and the service life of the lock is prolonged.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A clutch assembly, comprising:

a base (100);

the clutch (200) is rotatably arranged on the base (100), and a clutch control switch (210) is arranged on the clutch (200);

a drive mechanism (300) provided on the base (100);

the clutch control switch is characterized by comprising a clutch shifting plate (400) pivoted on the base (100), wherein the clutch shifting plate (400) is connected with the clutch control switch (210), the clutch shifting plate (400) can swing to drive the clutch control switch (210) to move, the clutch shifting plate (400) is connected with the driving mechanism (300), and the driving mechanism (300) can drive the clutch shifting plate (400) to swing.

2. The clutch assembly according to claim 1, further comprising at least one connecting member (500), wherein the connecting member (500) is disposed on the clutch driving plate (400), the clutch driving plate (400) is connected to the driving mechanism (300) through the connecting member (500), and the driving mechanism (300) can drive the connecting member (500) to drive the clutch driving plate (400) to swing.

3. The clutch assembly according to claim 1 or 2, wherein a sliding groove (211) is formed in the clutch control switch (210), the clutch dial (400) is at least partially embedded in the sliding groove (211), the clutch control switch (210) can slide along the clutch dial (400), and the clutch dial (400) swings to drive the clutch control switch (210) to reciprocate.

4. A clutch assembly according to claim 3, characterized in that the clutch plate (400) is provided with a first arc-shaped section (420), the first arc-shaped section (420) is at least partially embedded in the sliding groove (211), and the clutch control switch (210) can slide along the first arc-shaped section (420).

5. A clutch assembly according to claim 3, characterized in that the clutch control switch (210) is a plug pin, the clutch (200) also comprises a first control seat (220), a core seat (230), a second control seat (240) and a gear seat (250) which are rotatably sleeved together, the first control holder (220), the core holder (230) and the gear holder (250) are synchronously rotatable in at least one direction, the core print (230) is provided with a slot (231) for the plug pin to insert, the clutch shifting plate (400) swings to drive the plug pin to be inserted into the slot (231) or pulled out of the slot (231), when the bolt is inserted into the slot (231), the second control seat (240) can synchronously rotate with the first control seat (220), the core seat (230) and the gear seat (250); when the bolt is pulled out of the slot (231), the second control seat (240) does not rotate synchronously with the first control seat (220), the core seat (230) and the gear seat (250).

6. The clutch assembly according to claim 2, wherein the driving mechanism (300) comprises a motor (310), a screw (320) is arranged on a rotating shaft of the motor (310), and one end of the connecting piece (500) can be clamped with the thread teeth of the screw (320).

7. The clutch assembly according to claim 6, wherein the connecting member (500) is a torsion spring, the torsion spring is provided with a first connecting arm (510) and a second connecting arm (520), the first connecting arm (510) can be clamped with the thread teeth of the screw (320), and the second connecting arm (520) is fixed on the clutch dial plate (400).

8. The clutch assembly according to claim 1 or 2, wherein the base (100) is provided with a limiting structure capable of limiting the swing amplitude of the clutch driving plate (400).

9. The clutch assembly as claimed in claim 8, wherein the limit structure comprises a limit cylinder (110) and/or a travel switch (600), the limit cylinder (110) is arranged at the rear side of the clutch plectrum (400), and the clutch plectrum (400) is contacted with the limit cylinder (110) when swinging backwards to a maximum angle; the travel switch (600) is arranged on the rear side of the clutch shifting piece (400), and the clutch shifting piece (400) is contacted with the travel switch (600) when swinging backwards to the maximum angle.

10. A lock, characterized in that it comprises a clutch assembly according to any one of claims 1 to 9.