A small hammer hook mechanism

Abstract

The present invention provides a small hammer hook mechanism, comprising a hammer for striking a struck body, and a hook mechanism; the hook mechanism comprises a baffle, a receiver, a reset spring, an unlocking slide plate, a stop pin, a locking torsion spring shaft, a power mechanism, a locking torsion spring, a lock, a lock seat shaft, a lock seat, a lock seat torsion spring and a lock seat torsion spring shaft; the hook mechanism is fixed on a reciprocating motion platform, the hook mechanism can block or release the hammer, and the motion mechanism drives the lock that blocks the hammer to rotate and release the hammer; when the reciprocating motion platform drives the hook mechanism to move back, and after the lock blocks the hammer, the hammer spring is compressed to store the striking force used for the hammer to strike, and since the magnitude of the striking force is determined by the compression amount of the hammer spring, it is convenient to control the magnitude of the striking force of the hammer.

Description

Technical Field

[0001] The invention relates to the field of intermittent motion control of small hammers, and in particular to a small hammer hook mechanism. Background Art

[0002] A certain device requires continuous and rapid hammer strikes to complete a series of other actions, and requires the hammer's striking force to be maintained near a constant value. Therefore, some means are needed to first move the hammer to a certain position, store energy through a spring, and then release the hammer to quickly complete the strike, and then immediately enter the next cycle. Therefore, a set of reliable hammer hook mechanisms are needed to assist in realizing the above action functions. The entire device has relatively stringent requirements on the quality and installation space of the hammer hook mechanism. Since there is no suitable traditional hook mechanism to meet this function, it is very necessary to design a small hammer hook mechanism with intermittent motion control capabilities. Summary of the invention

[0003] In order to solve the above-mentioned problem, the present invention provides a small hammer hook mechanism, which is fixed on a reciprocating motion platform. The hook mechanism can block or release the hammer, and the motion mechanism drives the lock that blocks the hammer to rotate and release the hammer; when the reciprocating motion platform drives the hook mechanism to move back, and after the lock blocks the hammer, the hammer spring is compressed to store the striking force used for the hammer to strike. Since the size of the striking force is determined by the compression amount of the hammer spring, it is easy to control the size of the striking force of the hammer.

[0004] The object of the present invention is achieved in the following manner: a small hammer hook mechanism, comprising a hammer for striking a struck body, and a hook mechanism; the hook mechanism comprises a baffle, a receiver, a return spring, an unlocking slide plate, a baffle pin, a locking torsion spring shaft, a power mechanism, a locking torsion spring, a lock, a locking seat shaft, a locking seat, a locking seat torsion spring and a locking seat torsion spring shaft;

[0005] A hammer spring for storing energy is provided at the rear end of the hammer;

[0006] The lock blocks the hammer by rotating or releases the hammer to move away from the hammer spring to strike the struck object;

[0007] The lock seat is installed on the lock seat through the lock torsion spring shaft, the lock torsion spring is passed through the lock torsion spring shaft, one end of the lock torsion spring 15 is against the lock 16 below, and the other end of the straight arm is pressed by the lock seat; the lock seat is installed on the receiver through the lock seat shaft;

[0008] A baffle is provided at the left end of the receiver; a torsion spring of the locking seat is installed inside the receiver through a torsion spring shaft of the locking seat, a straight arm at one end of the torsion spring of the locking seat is pressed on the left bottom surface of the locking seat, and a straight arm at the other end of the torsion spring of the locking seat is pressed by the baffle;

[0009] An unlocking slide is slidably mounted in the receiver, a baffle is fixedly mounted at the end of the receiver close to the struck body, a return spring is arranged between the unlocking slide and the baffle, a power mechanism is arranged at the end of the unlocking slide away from the return spring, the return spring is compressed under the action of the external force applied by the power mechanism, and a stop pin is also arranged on the receiver to limit the distance of the unlocking slide away from the baffle;

[0010] At the distance between the baffle plate and the unlocking slide plate, the upper end of the locking seat is provided with a raised corner, and the lower surface of the unlocking slide plate close to the baffle plate is a plane. When the lock abuts against the hammer, it abuts against the top of the locking seat to prevent the hammer from rotating counterclockwise. A hollow part or a recessed part is provided in the middle of the unlocking slide plate to facilitate the counterclockwise rotation of the lock. When the unlocking slide plate moves toward the baffle plate and abuts against the raised corner on the upper end of the locking seat, the locking seat drives the lock to rotate counterclockwise.

[0011] The receiver is fixedly connected to the reciprocating platform, and the reciprocating platform drives the receiver to move in two directions, one is the same as the movement direction of the hammer under the action of the hammer spring, and the other is opposite.

[0012] A slideway is arranged on the inner side of the casing, and a slider is arranged on the side end of the unlocking slide. The unlocking slide moves on the slideway on the inner side of the casing through the slider.

[0013] The moving mechanism is an electromagnet, a cylinder, a hydraulic cylinder or an electric push rod; the outside of the electromagnet is wrapped with a material that shields the magnetic field, and a movable core shaft is provided in the center of the electromagnet. The end of the core shaft is fixedly connected to the unlocking slide or the unlocking slide is connected to the piston rod of the cylinder, the piston rod of the hydraulic cylinder or the electric push rod.

[0014] It also includes a guide column, on which a return spring is sleeved. The guide column is installed in one of the following two ways:

[0015] The baffle is provided with a guide hole through which the guide column can move forward and backward, the front end of the guide column is inserted into the baffle, and the rear end of the guide column is fixed on the unlocking slide. A return spring is sleeved on the guide column between the unlocking slide and the baffle;

[0016] Alternatively, the guide post is fixedly mounted on the receiver, and the front end is fixedly connected to the baffle, the unlocking slide is sleeved on the guide post, and a return spring is sleeved on the guide post between the unlocking slide and the baffle.

[0017] The rear end of the hammer is passed through the guide rod, and a support for fixing is provided on the guide rod. The support can be fixed on a carrier to remain stationary relative to the struck body, and a compressed hammer spring is sleeved on the guide rod between the hammer and the support.

[0018] A groove II is provided at the upper end of the hammer, and a slope I is provided on the rear end of the groove II. When the lock blocks the hammer, the slope I abuts against the end of the lock.

[0019] The inclined surface I of the hammer protrudes above the hammer and forms a protrusion II with the inclined surface II of the upper plane of the hammer.

[0020] The rear end of the unlocking slide plate is fixedly connected to the core shaft of the electromagnet through a pin.

[0021] Compared with the prior art, the hook mechanism of the present invention is fixed on a reciprocating motion platform. The hook mechanism can block or release the hammer, and the motion mechanism drives the lock that blocks the hammer to rotate and release the hammer; when the reciprocating motion platform drives the hook mechanism to move back, and after the lock blocks the hammer, the hammer spring is compressed to store the striking force used for the hammer to strike. Since the size of the striking force is determined by the compression amount of the hammer spring, it is easy to control the size of the striking force of the hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a front cross-sectional view of the small hammer hook mechanism of the present application.

[0023] Figure 2 yes Figure 1 Schematic diagram of the axonometric view.

[0024] Figure 3 yes Figure 1 Schematic diagram of an axial partial cross-sectional view of a hook mechanism.

[0025] 1. struck body, 2. hammer, 3. baffle, 4. receiver, 5. return spring, 6. guide column, 7. unlocking slide plate, 8. stop pin, 9. locking torsion spring shaft, 10. pin, 11. electromagnet, 12. guide rod, 13. support, 14. hammer spring, 15. locking torsion spring, 16. lock, 17. locking seat shaft, 18. locking seat, 19. locking seat torsion spring, 20. locking seat torsion spring shaft, 21 boss, 22 corner, 23 protrusion I, 24 plane I, 25 plane II, 26 groove II, 27 inclined plane I, 28 protrusion II, 29 position sensor or displacement sensor, 30 reciprocating motion platform, 31 inclined plane II, 32 hollow part, 33 connecting plate, 34 inclined plane III, 35 rectangular plate. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with specific embodiments. It is necessary to point out that this embodiment is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical personnel skilled in the art can make some non-essential improvements and adjustments based on the above-mentioned contents of the present invention.

[0027] like Figure 1-Figure 3As shown, a small hammer buckle mechanism includes a hammer 2 and a buckle mechanism; the buckle mechanism includes a baffle 3, a receiver 4, a return spring 5, a guide column 6, an unlocking slide 7, a stop pin 8, a locking torsion spring shaft 9, a pin 10, a moving mechanism electromagnet 11, a locking torsion spring 15, a lock 16, a lock seat shaft 17, a lock seat 18, a lock seat torsion spring 19 and a lock seat torsion spring shaft 20.

[0028] The struck body 1 is a trigger of a device, fixed to the left of the hammer 2, the rear end of the hammer 2 is passed through the guide rod 12, the guide rod is provided with a support 13 for fixing, the support 13 can be fixed on a carrier to remain motionless relative to the struck body 1, and the guide rod between the hammer and the support is sleeved with a compressed hammer spring 14. A groove II 26 is provided at the upper end of the hammer, and an inclined surface I 27 is provided at the rear end of the groove II 26.

[0029] The lock 16 is installed on the lock seat 18 through the lock torsion spring shaft 9, and the lock torsion spring 15 is passed through the lock torsion spring shaft 9. The straight wall of one end of the lock torsion spring 15 is against the lock 16 below, and the other end of the straight arm is pressed by the lock seat. The torsion spring force of the lock torsion spring 15 is applied to the lock seat 18 and the lock 16 respectively, and then the lock seat 18 is installed on the receiver 4 using the lock seat shaft 17.

[0030] The shape of the lock 16 can be a rectangular plate 35, with connecting plates 33 fixed on both sides above one end of the rectangular plate 35, the connecting plate 33 passing through the lock torsion spring shaft 9, and installed on the lock seat 18 through the lock torsion spring shaft 9, and the lock torsion spring 15 passing through the lock torsion spring shaft 9 between the two connecting plates 33, one end of the lock torsion spring 15 is against the rectangular plate above the lock 16, and the other end of the straight arm is pressed by the lock seat, the torsion spring force of the lock torsion spring 15 is applied to the lock seat 18 and the lock 16 respectively, and then the lock seat shaft 17 is used to install the lock seat 18 on the receiver 4.

[0031] A baffle 3 is provided at the left end of the receiver 4; a lock seat torsion spring 19 is installed inside the receiver 4 through a lock seat torsion spring shaft 20, one end of the straight arm of the lock seat torsion spring 19 is pressed on the left bottom surface of the lock seat 18, and the other end of the straight arm of the lock seat torsion spring 19 is pressed tightly with a baffle 3.

[0032] A movable mandrel is provided at the center of the electromagnet 11, and the front end of the mandrel is fixedly connected to the unlocking slide plate 7;

[0033] A slideway is provided on the inner side of the receiver 4, and a slider is provided on the side end of the unlocking slide 7. The unlocking slide 7 is pushed toward the left end of the receiver 4, and the unlocking slide 7 can slide on the internal slideway of the receiver 4 through the slider. A boss 21 is provided on the upper left end of the unlocking slide 7. The stop pin 8 is mounted on the receiver 4 and is located at the rear end of the boss 21 of the unlocking slide 7 to block the unlocking slide 7 from moving to the right; the baffle 3 is fixedly installed on the left end of the receiver 4 with screws, and a guide hole is provided on the baffle 3. One end of the guide column 6 is fixedly connected to the boss 21 of the unlocking slide 7 by threads, and the other end of the guide column 6 is inserted into the guide hole of the baffle 3; the return spring 5 is sleeved on the guide column 6, and the baffle compresses the return spring 5.

[0034] The guide column 6 can also be installed as follows: fixedly installed on the casing 4, and the front end is fixedly connected to the baffle 3, the unlocking slide 7 is sleeved on the guide column 6, and a return spring 5 is also sleeved on the guide column 6 and between the unlocking slide 7 and the baffle 3.

[0035] The lower surface of the left end of the unlocking slide plate 7 is a plane II 25, and a hollow portion 32 is provided in the middle to facilitate the counterclockwise rotation of the lock.

[0036] The casing 4 and the electromagnet 11 are fixedly mounted on the same reciprocating motion platform 30. The reciprocating motion platform is an existing reciprocating motion platform 30.

[0037] The left end of the locking seat 18 has an upwardly protruding corner 22, and the middle upper surface is a plane Ⅰ24. The plane Ⅰ24 of the middle upper surface is connected to the corner 22 at the left end through an inclined surface Ⅲ34. The inclined surface Ⅲ34 is arranged downwardly from right to left. During the unlocking process of the hammer 2, the inclined surface Ⅲ does not prevent the unlocking slide 7 from sliding forward; the right end of the plane Ⅰ24 of the middle upper surface is provided with an upward protrusion Ⅰ23, and the state of the hook mechanism when locking the hammer is as follows Figure 1 : The lock 16 is arranged obliquely, and the lower end of the lock 16 abuts against the inclined surface Ⅰ27 at the rear end of the hammer groove Ⅱ26. The left end surface of the rectangular plate 35 of the lock abuts against the lock seat 18. There is enough space between the connecting plate 33 and the lock seat 18 to facilitate the lock 16 to rotate counterclockwise upward and disengage from the hammer 2, and at this time, the inclination angle of the rectangular plate 35 is less than or equal to the inclination angle of the plane Ⅰ24; the lock seat torsion spring 19 abuts against the bottom surface of the left end of the lock seat 18, and the plane Ⅰ24 on the upper surface of the middle part of the lock seat 18 is at the highest point in the inclined state, and the protrusion Ⅰ23 contacts with the plane Ⅱ25 of the lower surface of the left end of the unlocking slide plate 7, which limits the rotation of the lock seat 18, while limiting the rotation of the lock seat 18 together with the lock seat torsion spring shaft 20, the lock seat torsion spring 19, and the lock seat shaft 17, giving the lock 16 force to resist the thrust of the compressed hammer spring 14 on the hammer.

[0038] The working process of the hammer 2 unlocking is as follows: the electromagnet 11 is energized to push out its core shaft, thereby driving the unlocking slide 7 to move to the left, and the left end surface of the unlocking slide 7 squeezes the upper corner 22 of the locking seat 18. At this time, the lower surface of the left end of the unlocking slide 7 is out of contact with the protrusion I 23 at the right end of the middle part of the locking seat 18, so that the locking seat 18 rotates around the locking seat axis 17, and the locking lock 16 on the locking seat 18 rotates counterclockwise with the locking seat 18 (when the angle at which the inclined surface III 34 connects with the left end surface of the rectangular plate of the lock is not enough to make the locking lock 16 rotate counterclockwise with the locking seat When the lock 16 is unlocked, the lower surface of the lock 16 is disengaged from the inclined surface Ⅰ27 of the hammer 2, and the hammer 2 is released, and moves to the left under the action of the hammer spring 14, strikes the struck body 1, and stops. After the hammer 2 is released, the electromagnet 11 is powered off, and the unlocking slide 7 is reset to the right under the action of the reset spring 5, and reaches the position of the stop pin 8 again. The lock seat 18 is locked in the lock seat torsion spring 19. 18 and the locking mechanism 10 are in contact with each other, and the locking mechanism 10 is in contact with the locking mechanism 10. The locking mechanism 10 is in contact with the locking mechanism 10 and the locking mechanism 10 is in contact with the locking mechanism 10. The locking mechanism 10 is in contact with the locking mechanism 10 and the locking mechanism 10 is in contact with the locking mechanism 10. When the lower end of the latch reaches the inclined surface Ⅰ27 on the groove of the hammer, the latch 16 is quickly reset under the action of the latch torsion spring 15, and then the reciprocating platform 30 drives the hook mechanism to move to the right, and at the same time, the latch 16 moves to the right together against the inclined surface Ⅰ27 of the hammer 2, and compresses the hammer spring 14. When the hook mechanism moves to the initial starting position, the hammer also returns to the initial starting position, the reciprocating platform 30 stops moving, the electromagnet 11 is energized, and the unlocking slide 7 is pushed again to complete the unlocking, release the hammer 2, and enter the next cycle. In this application, since the hammer also returns to the initial starting position, the compression distance of the hammer spring 14 is constant, so the striking force of the hammer after being released is a certain value.

[0039] Or there is no protrusion Ⅰ23, the state of the locking mechanism when locking the hammer is as follows Figure 2: The lock 16 is arranged obliquely, and the lower end of the lock 16 abuts against the inclined surface Ⅰ27 at the rear end of the hammer groove Ⅱ26. The left end surface of the rectangular plate of the lock abuts against the lock seat 18. There is enough space between the connecting plate 33 and the lock seat 18, so that the lock 16 can rotate counterclockwise upward and disengage from the hammer 2, and at this time, the inclination angle of the rectangular plate is less than or equal to the inclination angle of the plane Ⅰ24; the lock seat torsion spring 19 abuts against the bottom surface of the left end of the lock seat 18, and the plane Ⅰ24 on the upper surface of the middle part of the lock seat 18 contacts the plane Ⅱ25 of the lower surface of the left end of the unlocking slide plate 7 at the highest point in the inclined state, which limits the rotation of the lock seat 18, and at the same time, together with the lock seat torsion spring shaft 20, the lock seat torsion spring 19, and the lock seat shaft 17, limits the rotation of the lock seat 18, and gives the lock 16 force to resist the thrust of the compressed hammer spring 14 on the hammer.

[0040] At this time, when the hammer 2 is unlocked, when the unlocking slide 7 moves to the left, the force balance state of the lock seat 17 is broken, so that the lock seat 18 rotates around the lock seat shaft 17, and the lock 16 on the lock seat 18 rotates counterclockwise with the lock seat 18. When the lower surface of the lock 16 is separated from the inclined surface Ⅰ27 of the hammer 2, the hammer 2 is released. Correspondingly, when the hook mechanism moves to the left until the lower end surface of the lock 16 contacts the upper surface behind the groove of the hammer 2, the highest point of the upper surface plane Ⅰ24 of the middle part of the lock seat 18 in the inclined state contacts the lower surface plane Ⅱ25 of the left end of the unlocking slide 7 to form a force balance on the lock seat 17, limiting the rotation of the lock seat 18.

[0041] like Figure 1 If the right side of the groove of hammer 2 is inclined surface II 31, and the inclined surface I 27 of the groove forms a protrusion II 28, the lock 16 must pass over the protrusion II 28 above the hammer 2 and return to the inclined surface I 27 that locks the hammer 2. Under the action of the inclined surface II at the upper end of the hammer 2, the lock torsion spring shaft 9 rotates counterclockwise. When the lock 16 passes over the upper end protrusion II 28 of the hammer 2, under the action of the lock torsion spring 15, the lock 16 is quickly reset, and then the reciprocating platform 30 drives the hook mechanism to move to the right. At the same time, the lock 16 hooks the protrusion II 28 of the hammer 2 and moves to the right together, and compresses the hammer spring 14. When the hook mechanism moves to the initial starting position, the hammer also returns to the initial starting position, the reciprocating platform 30 stops moving, the electromagnet 11 is energized, and the unlocking slide plate 7 is pushed again to complete the unlocking, release the hammer 2, and enter the next cycle.

[0042] A position sensor or displacement sensor 29 for measuring the position movement of the hammer is also provided. The position sensor or displacement sensor 29 for measuring the position movement of the hammer is connected to a controller. The controller is connected to a power supply for supplying power to the electromagnet to control the electromagnet to be powered on or off. When the hammer is released, the position sensor or displacement sensor 29 for measuring the position of the hammer transmits a signal to the controller to control the electromagnet to be powered off; when the hammer returns to the initial starting position, the position sensor or displacement sensor 29 for measuring the position of the hammer transmits a signal to the controller to control the electromagnet 11 to be powered on.

[0043] The rear end of the unlocking slide plate 7 can be fixedly connected to the core shaft of the electromagnet through a pin 10.

[0044] Two guide rods 12 are fixedly connected to the hammer 2 .

[0045] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for those skilled in the art and any technician familiar with the technical field, without departing from the overall concept of the present invention, the technical solution and the inventive concept of the present invention are equivalently replaced or changed, and several changes and improvements are made, which should also be regarded as the protection scope of the present invention.

Claims

1. A small hammer hook mechanism, comprising a hammer for striking a struck object, characterized in that: It also includes a hook mechanism; the hook mechanism includes a baffle (3), a casing (4), a return spring (5), an unlocking slide (7), a stop pin (8), a locking torsion spring shaft (9), a power mechanism (11), a locking torsion spring (15), a lock (16), a locking seat shaft (17), a locking seat (18), a locking seat torsion spring (19) and a locking seat torsion spring shaft (20); A hammer spring (14) for storing energy is provided at the rear end of the hammer (2); The latch (16) blocks the hammer by rotating or releases the hammer to move in a direction away from the hammer spring (14) to strike the struck object; A locking seat (18), wherein the locking (16) is mounted on the locking seat (18) via a locking torsion spring shaft (9), the locking torsion spring (15) is passed through the locking torsion spring shaft (9), one end of the locking torsion spring (15) is against the locking (16) below, and the other end of the straight arm is pressed by the locking seat; the locking seat (18) is mounted on the casing (4) via the locking seat shaft (17); A baffle (3) is provided at the left end of the casing (4); a locking seat torsion spring (19) is installed inside the casing (4) through a locking seat torsion spring shaft (20); a straight arm at one end of the locking seat torsion spring (19) is pressed on the left bottom surface of the locking seat (18), and a straight arm at the other end of the locking seat torsion spring (19) is pressed by the baffle (3); An unlocking slide (7) is slidably mounted in the casing (4); a baffle (3) is fixedly mounted on the casing (4) at an end close to the struck body; a return spring (5) is provided between the unlocking slide (7) and the baffle (3); a power mechanism (11) is provided at one end of the unlocking slide (7) away from the return spring; the return spring (5) is compressed under the action of an external force applied by the power mechanism (11); and a stop pin (8) is also provided on the casing (4) for limiting the distance of the unlocking slide (7) away from the baffle. A raised corner is provided on the upper end of the locking seat (18) over the distance that the unlocking slide plate (7) moves between the baffle plate and the unlocking slide plate (7); the lower surface of the end of the unlocking slide plate (7) close to the baffle plate is a plane; when the locking plate abuts against the hammer, the unlocking slide plate (7) abuts against the upper part of the locking seat to prevent the locking seat from rotating counterclockwise; a hollow portion or a recessed portion is provided in the middle of the unlocking slide plate (7) to facilitate the counterclockwise rotation of the locking seat; when the unlocking slide plate (7) moves toward the baffle plate and abuts against the raised corner on the upper end of the locking seat (18), the locking seat (18) drives the locking seat to rotate counterclockwise; The casing (4) is fixedly connected to the reciprocating platform (30), and the reciprocating platform (30) drives the casing to move in two directions, one in the same direction as the movement direction of the hammer under the action of the hammer spring (14), and the other in the opposite direction.

2. The small hammer hook mechanism according to claim 1, characterized in that: A slideway is provided on the inner side of the casing (4), and a slider is provided on the side end of the unlocking slide plate (7). The unlocking slide plate (7) moves on the slideway on the inner side of the casing (4) via the slider.

3. The small hammer hook mechanism according to claim 1, characterized in that: The power mechanism is an electromagnet, a cylinder, a hydraulic cylinder or an electric push rod; the electromagnet is wrapped with a material that shields the magnetic field, and a movable core shaft is provided at the center of the electromagnet, and the end of the core shaft is fixedly connected to the unlocking slide (7), or the unlocking slide (7) is connected to the piston rod of the cylinder, the piston rod of the hydraulic cylinder or the electric push rod.

4. The small hammer hook mechanism according to claim 1, characterized in that: It also includes a guide column (6), and the installation of the guide column (6) is specifically one of the following two methods: The baffle (3) is provided with a guide hole through which the guide column (6) can move forward and backward, the front end of the guide column (6) is inserted into the baffle, and the rear end of the guide column (6) is fixed on the unlocking slide (7), and a return spring (5) is sleeved on the guide column (6) between the unlocking slide (7) and the baffle (3); Alternatively, the guide column (6) is fixedly mounted on the casing (4), and the front end is fixedly connected to the baffle (3), the unlocking slide (7) is sleeved on the guide column (6), and a return spring (5) is sleeved on the guide column (6) between the unlocking slide (7) and the baffle (3).

5. The small hammer hook mechanism according to claim 1, characterized in that: The rear end of the hammer (2) is passed through a guide rod (12), a support (13) for fixing is provided on the guide rod, the support (13) is fixed on a carrier and remains stationary relative to the struck body (1), and a compressed hammer spring (14) is sleeved on the guide rod between the hammer and the support.

6. The small hammer hook mechanism according to claim 5, characterized in that: A groove II (26) is provided at the upper end of the hammer, and an inclined surface I (27) is provided at the rear end of the groove II (26). When the latch (16) blocks the hammer (2), the inclined surface I (27) abuts against the end of the latch (16).

7. The small hammer hook mechanism according to claim 6, characterized in that: The inclined surface I (27) of the hammer (2) protrudes above the hammer and forms a protrusion II (28) with the inclined surface II (31) of the upper plane of the hammer.

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