Force limiting shock absorption device

Abstract

The present invention provides a force-limiting and shock-absorbing device, which is provided with a main body, a knocking piece, a shock-absorbing elastic piece and a force-limiting group. The main body is provided with a coupling portion and a gripping portion. The knocking piece is movably coupled to the main body and can move relative to the coupling portion. The knocking piece is provided with a sleeve portion, a knocking portion and a locking portion. The sleeve portion is movably coupled to the sleeve hole of the coupling portion. The knocking portion is provided at one end of the sleeve portion and is located below the coupling portion. The locking portion is combined with the sleeve portion and abuts against the coupling portion. The shock-absorbing elastic piece is sleeved on the sleeve portion and abuts against the coupling portion and the knocking portion. The force-limiting group is provided between the knocking piece and the main body and has no contact with the shock-absorbing elastic piece. When in use, the force-limiting and shock-absorbing device has a three-stage force-limiting reminder effect, thereby providing a force-limiting and shock-absorbing device with a reminder effect, improved vibration feeling and the ability to adjust the force application range as needed.

Description

Technical Field

[0001] The present invention relates to a force-limiting shock-absorbing device, in particular to a force-limiting shock-absorbing device which has a reminder effect, improves vibration feeling and can adjust the force application range according to needs. Background Art

[0002] The hammers or sledgehammers currently used in the industry to drive nails into wooden boards, concrete walls or metal plates often bounce due to the reaction force during the strike. This not only shortens the contact time between the striking surface of the hammer or sledgehammer and the nail body, but also easily causes the nail body to bend or deflect. In addition, the immediate rebound reaction force is converted into heat energy and noise losses, which relatively reduces the efficiency of the user's force application. In other words, the applied force cannot be fully used on the nail body, and the user needs to strike the nail body multiple times before the nail body can be driven into and fixed in the wood. The number of strikes and the time required to strike the board or wall will increase. In addition, when the user holds the handle of the hammer or sledgehammer, the bouncing vibration generated by the striking may also make the user feel uncomfortable. Furthermore, the striking surface of existing medical hammers or surgical hammers is mostly a rigid structure. Therefore, when a dentist uses an existing medical hammer or surgical hammer in artificial dental implant surgery, the rebound force generated by the reaction force not only makes the doctor feel difficult to hold and uncomfortable, but also causes pain to the patient due to the striking force, and may even cause concussion.

[0003] In view of this, the rigid striking surfaces of existing industrial hammers, iron hammers, medical hammers, surgical hammers, etc. will generate an immediate rebound reaction force when used, which not only produces a considerable degree of noise and discomfort, but also affects the smoothness and controllability of their operation. In addition, they cannot provide a reminder effect of the strength of the force, and cannot allow the user to strike within the corresponding force range. Not only is it easy for the user to feel uncomfortable and feel the rebound caused by the reaction force, but the object or object receiving the force will feel vibration or discomfort. In addition, existing industrial hammers, iron hammers, medical hammers, surgical hammers, etc. cannot be adjusted according to the needs of the user, which relatively limits their practicality and flexibility. There is indeed room for improvement. Summary of the Invention

[0004] Therefore, in view of the shortcomings and deficiencies in the structures and uses of existing industrial hammers, iron hammers, medical hammers or surgical hammers, golf club heads, etc., the inventors have finally developed a present invention that can improve the existing shortcomings after continuous research and testing.

[0005] The main purpose of the present invention is to provide a force-limiting and shock-absorbing device, which, through a streamlined structural configuration, can avoid the generation of immediate rebound reaction force when knocking, so that its reaction force produces a delayed rebound effect, and increases the contact time between its knocking surface and the knocked object. During the knocking process, it can remind the user whether the force applied has exceeded the set force range, allowing the user to knock with appropriate force, effectively avoiding the user feeling difficult to hold and uncomfortable, and avoiding vibration of the force-receiving object or object. Furthermore, the force range of the force-limiting and shock-absorbing device can be adjusted according to the needs of the user, thereby providing a force-limiting and shock-absorbing device with a reminder effect, improved vibration feeling and the ability to adjust the force range as needed.

[0006] To achieve the above-mentioned purpose, the present invention mainly provides a force-limiting and shock-absorbing device, which includes:

[0007] A main body, which is a long rod, has a connecting portion at one end, the connecting portion has a set of holes, and a grip portion at one end of the main body away from the connecting portion;

[0008] a striking member movably coupled to the body and capable of moving relative to the coupling portion, the striking member comprising a sleeve portion, a striking portion, and a locking portion; the sleeve portion movably coupled to the sleeve hole of the coupling portion; the striking portion being disposed at one end of the sleeve portion and below the coupling portion; and the locking portion being coupled to the sleeve portion and abutting against the coupling portion;

[0009] a shock-absorbing elastic member, which is sleeved on the sleeve portion and abuts against the combining portion and the striking portion; and

[0010] a force limiting group disposed between the striking member and the body, for reminding the user whether the striking force exceeds the force range set by the force-limiting and shock-absorbing device during striking. The force limiting group includes a force limiting member located between the sleeve portion and the coupling portion and not in contact with the shock-absorbing elastic member, thereby providing a force-limiting reminder effect and further shock-absorbing effect;

[0011] The force limiting and shock absorbing device has a three-stage force limiting reminder effect when in use. It can identify the force in the first stage by judging whether the locking portion is separated from the connecting portion, and can also judge whether the connecting portion contacts the force limiting member to generate resistance as the second stage of force identification. It can also judge whether the force limiting member is compressed and immediately rebounds as the third stage of force identification.

[0012] Furthermore, as described above, the force limiting shock absorbing device, wherein the force limiting group is provided with a sleeve and a positioning seat, the sleeve is integrally formed at the bottom of the combination part and is provided with a through hole communicating with the sleeve hole, the positioning seat is integrally provided at the place where the sleeve part and the knocking part are combined, the sleeve is spaced apart above the positioning seat, the shock absorbing elastic part is sleeved between the sleeve and the positioning seat, and is abutted against the combination part and the knocking part, and the force limiting part is sleeved on the sleeve part and located between the positioning seat and the sleeve; in addition, a reminder element that emits light or sound can be provided on the force limiting part, and when the sleeve and the force limiting part touch, the user can be reminded of the magnitude of the force applied by light or sound.

[0013] Furthermore, in the force limiting and shock absorbing device as described above, the force limiting group is provided with at least one magnetic component, and the at least one magnetic component is provided on the locking portion and can be magnetically attracted to the coupling portion, thereby providing a further force limiting reminder effect.

[0014] Preferably, in the force limiting and shock absorbing device as described above, the force limiting member is a spring, annular rubber or silicone, an elastic metal block or an elastic block or bushing which is set on the sleeve portion and located between the sleeve and the positioning seat.

[0015] Preferably, in the force-limiting and shock-absorbing device as described above, the force-limiting member is slidably mounted on or fixed to the mounting portion.

[0016] Preferably, in the force-limiting and shock-absorbing device as described above, the force-limiting member is fixed on the positioning seat and spaced apart from the sleeve member, or fixed on the sleeve member and spaced apart from the positioning seat.

[0017] Preferably, the force limiting shock absorbing device as described above, wherein the force limiting member is provided with a limiting groove, a receiving groove, a limiting bolt, a fixing member and a pushing unit, wherein the limiting groove is annularly recessed on the outer surface of the sleeve portion and has at least one inner inclined wall, the receiving groove is radially formed on the coupling portion, the limiting bolt is movably arranged in the receiving groove and faces the sleeve portion, the limiting bolt is provided with an inclined surface that can be abutted against the inner inclined wall of the limiting groove, the fixing member is combined with the outer end of the receiving groove, the pushing unit is arranged in the receiving groove and is located between the fixing member and the limiting bolt, pushing the limiting bolt through the sleeve hole and against the outer surface of the sleeve portion.

[0018] Preferably, the force limiting shock absorbing device as described above, wherein the force limiting member is provided with a limiting groove, a receiving groove, a limiting bolt, a fixing member, a pushing unit and a pull rod, wherein the limiting groove is annularly recessed in the outer surface of the sleeve and has at least one inner inclined wall, the receiving groove is radially formed on the coupling portion, the limiting bolt is movably arranged in the receiving groove and faces the sleeve, the limiting bolt is provided with an inclined surface that can be abutted against the inner inclined wall of the limiting groove, the fixing member is combined with the outer end of the receiving groove, the pushing unit is arranged in the receiving groove and is located between the fixing member and the limiting bolt, pushing the limiting bolt through the sleeve hole and against the outer surface of the sleeve, one end of the pull rod is located outside the coupling portion, and the other end is fixedly combined with the limiting bolt through the fixing member and the pushing unit.

[0019] Preferably, the force limiting shock absorbing device as described above, wherein the coupling part is provided with a limit block between the sleeve hole and the sleeve part, the limit block is fixed to the sleeve hole of the coupling part and is penetrated by a through hole, the limit block is sleeved on the outside of the sleeve part through the through hole, the force limiting part is provided with a receiving groove, a limit bolt, a fixing part and a pushing unit, the receiving groove is radially formed on the coupling part and communicates with the sleeve hole, the limit bolt is movably provided in the receiving groove and abuts against the outer surface of the limit block, the fixing part is combined with the outer end of the receiving groove, and the pushing unit is provided in the receiving groove and is located between the fixing part and the limit bolt.

[0020] Preferably, in the force limiting and shock absorbing device as described above, the limiting bolt is magnetic, and a magnetic piece is provided on the outer surface of the limiting block, and the magnetic piece faces the limiting bolt and is magnetically attracted to each other.

[0021] Preferably, the force limiting shock absorbing device as described above, wherein the force limiting member is provided with a limiting groove, a receiving groove and a limiting bolt, the limiting groove radially passes through the sleeve portion, the receiving groove is radially formed on the coupling portion and communicates with the sleeve hole, the limiting bolt is located in the receiving groove, the limiting bolt is magnetic, and the sleeve portion is provided with a magnetic member located in the limiting groove, and when the sleeve portion moves relative to the coupling portion, the magnetic member will correspond to the limiting bolt.

[0022] Preferably, in the force limiting and shock absorbing device as described above, the force limiting member is sleeved on the sleeve portion and located between the locking portion and the combining portion.

[0023] Preferably, in the force-limiting shock-absorbing device as described above, the striking portion of the striking member is a spherical, flat, axe-shaped, curved or conical structure.

[0024] Preferably, the force limiting shock absorbing device as described above, wherein the bottom of the limiting block extends out of the coupling portion through the sleeve hole, so that the shock absorbing elastic member is partially sleeved on the outside of the limiting block, and the force limiting member is provided with a limiting groove in an annular shape on the outer surface of the shock absorbing elastic member, so that the limiting bolt can abut against the limiting block through the limiting groove.

[0025] Preferably, the force limiting and shock absorbing device as described above is provided with a positioning seat at the junction of the sleeve portion and the striking portion, and the force limiting and shock absorbing device is provided with an auxiliary elastic member on the sleeve portion, and the auxiliary elastic member is located between the shock absorbing elastic member and the positioning seat.

[0026] Preferably, the force-limiting shock-absorbing device as described above, wherein the force-limiting group is provided with a sleeve and a positioning seat, the sleeve is a groove structure recessed into the combining portion, the positioning seat is provided at the place where the sleeve and the knocking portion are combined, and extends into the sleeve through the bottom of the combining portion, and the shock-absorbing elastic member is sleeved on the outside of the positioning seat and abuts between the combining portion and the knocking portion, and there is a distance between the sleeve and the positioning seat.

[0027] Preferably, the force limiting shock absorbing device as described above, wherein the force limiting group is provided with a sleeve and a positioning seat, the sleeve is provided at the bottom of the combining part and is located on one side of the sleeve, and the positioning seat is provided on the striking part and is located on one side of the sleeve and is spaced apart from the sleeve.

[0028] Preferably, the force limiting shock absorbing device as described above, wherein the force limiting group is provided with a sleeve and a positioning seat, the sleeve is provided at the bottom of the joint part and is annularly arranged on the outer periphery of the sleeve part, the positioning seat is provided on the knocking part and is annularly arranged on the outer periphery of the sleeve part, and is spaced apart from the sleeve.

[0029] Preferably, as described above, the force limiting shock absorbing device, wherein the coupling portion is horizontally penetrated by a through groove, the sleeve portion extends into the through groove through the bottom of the coupling portion, and the locking portion is combined with the sleeve portion through the through groove, and the force limiting member is arranged between the coupling portion and the locking portion and is located in the through groove.

[0030] Through the above-mentioned technical features, the structure of the force-limiting and shock-absorbing device of the present invention is simplified, and it is relatively convenient to manufacture, maintain and replace. It only needs to set the force-limiting group between the joint part of the main body and the knocking part. It can not only remind the user of the knocking force by identifying whether the force-limiting group is compressed, thereby providing a force-limiting effect, but also produce a delayed rebound (Delayed Rebound) shock-absorbing and vibration-absorbing effect for the reaction force generated when the knocking part knocks, and at the same time increase the contact time between the knocking surface of the knocking part and the knocked object, which not only makes the knocked object less likely to bend, but also reduces energy loss and noise generation, relatively reduces the number of knocks and the required time, and alleviates the user's discomfort, allowing the user to hold the main body firmly for knocking. Moreover, due to the simplified structure, different elastic tensions of the force-limiting group can be provided by replacing force-limiting groups with different elastic strengths or by rotating the locking part, thereby providing a force-limiting and shock-absorbing device with a reminder effect, improved vibration feeling and the ability to adjust the force application range as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional appearance diagram of the first preferred embodiment of the present invention.

[0032] Figure 2 It is a three-dimensional exploded view of the first preferred embodiment of the present invention.

[0033] Figure 3 It is a partially enlarged sectional side view of the first preferred embodiment of the present invention.

[0034] Figure 4 and Figure 5 It is a side view of the knocking operation of the first preferred embodiment of the present invention.

[0035] Figure 6 It is a partially enlarged sectional side view of the second preferred embodiment of the present invention.

[0036] Figure 7 It is a partially enlarged sectional side view of the third preferred embodiment of the present invention.

[0037] Figure 8 It is a side view of the knocking operation of the third preferred embodiment of the present invention.

[0038] Figure 9 It is a partially enlarged sectional side view of the fourth preferred embodiment of the present invention.

[0039] Figure 10 It is a side view of the knocking operation of the fourth preferred embodiment of the present invention.

[0040] Figure 11 It is a partially enlarged sectional side view of a fifth preferred embodiment of the present invention.

[0041] Figure 12 It is a partially enlarged sectional side view of the sixth preferred embodiment of the present invention.

[0042] Figure 13 It is a partially enlarged sectional side view of the seventh preferred embodiment of the present invention.

[0043] Figure 14 It is a partially enlarged sectional side view of the eighth preferred embodiment of the present invention.

[0044] Figure 15 It is a partially enlarged sectional side view of the ninth preferred embodiment of the present invention.

[0045] Figure 16 It is a partially enlarged cross-sectional side view of the tenth preferred embodiment of the present invention.

[0046] Figure 17 It is a partially enlarged sectional side view of the eleventh preferred embodiment of the present invention.

[0047] Figure 18 It is a partially enlarged sectional side view of the twelfth preferred embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to understand the technical features and practical effects of the present invention in detail and to realize them according to the contents of the specification, a preferred embodiment as shown in the accompanying drawings is now further described in detail as follows:

[0049] The present invention is a force limiting shock absorbing device. Figures 1 to 3 In the first preferred embodiment shown, the force limiting and shock absorbing device comprises a main body 10, a striking member 20 and a force limiting assembly 30, wherein:

[0050] The main body 10 is a long metal rod. A connecting portion 11 is provided at one end of the main body 10. A sleeve hole 111 is axially extended through the connecting portion 11. A gripping portion 12 is provided at the end of the main body 10 away from the connecting portion 11. Furthermore, the gripping portion 12 is provided with an anti-slip structure on the outer surface. Preferably, the anti-slip structure is a plurality of annular grooves 121 spaced apart and recessed on the outer surface of the gripping portion 12, so that the user can firmly grip the gripping portion 12 of the main body 10.

[0051] The knocking member 20 is movably combined with the main body 10 and can move relative to the connecting portion 11. The knocking member 20 is provided with a sleeve portion 21, a knocking portion 22 and a locking portion 23. The sleeve portion 21 is movably combined with the connecting portion 11 of the main body 10. Preferably, the sleeve portion 21 is a rod passing through the sleeve hole 111 of the connecting portion 11. Preferably, the cross-section of the sleeve portion 21 is in a shape consistent with the cross-sectional shape of the sleeve hole 111, wherein when the sleeve portion 21 has a circular cross-section, the sleeve portion 21 can rotate relative to the connecting portion 11, and when the sleeve portion 21 has a polygonal cross-section, the sleeve portion 21 can only move relative to the connecting portion 11 and cannot rotate. The sleeve portion 21 is provided with a locking structure 211 on the outer surface of one end.

[0052] The striking portion 22 is provided at one end of the sleeve portion 21 away from the locking structure 211 and is located below the coupling portion 11. Furthermore, the striking portion 22 is integrally formed with the sleeve portion 21. The striking portion 22 can be made of a hard material such as metal, polyethylene (PE) or plastic, or an elastic material such as rubber, silicone or wood. In addition, the striking portion 22 can also be made of a metal with magnetism so that the striking portion 22 can adsorb a nail when in use. The striking portion 22 can also be a spherical, flat, axe-shaped, curved or conical structure, and the striking portion 22 has a striking surface 221 at the bottom. Furthermore, the striking surface 221 can be made of a hard material such as metal, polyethylene (PE) or plastic, or an elastic material such as rubber, silicone, wood or leather.

[0053] The locking portion 23 is combined with the sleeve portion 21 and abuts against the joint portion 11 of the body 10, so that the knocking portion 22 is located below the joint portion 11, wherein the relationship between the locking portion 23 and the sleeve portion 21 is an adjustable structure. Further, the locking portion 23 is disc-shaped and is penetrated by a locking hole 231. The locking hole 231 is linearly opposite to the sleeve hole 111 of the joint portion 11 and is combined with the locking structure 211 of the sleeve portion 21. Figure 3The position where the locking portion 23 is combined with the sleeve portion 21 is adjustable, thereby changing the distance between the knocking portion 22 and the joint portion 11. The force limiting group 30 is provided on the sleeve portion 21 of the knocking member 20 and abuts against the joint portion 11 of the main body 10 and the knocking portion 22 of the knocking member 20. The force limiting group 30 is used to remind the user whether the knocking force exceeds the force range set by the force limiting and shock absorbing device when knocking. The force limiting group 30 is provided with a sleeve 31, a positioning seat 32, a shock absorbing elastic member 33 and a force limiting member 34. The sleeve 31 is integrally formed at the bottom of the joint portion 11 and is provided with a through hole 311 communicating with the sleeve hole 111, wherein the outer diameter of the sleeve 31 is smaller than the outer diameter of the joint portion 11, so that the sleeve 31 is 1 forms a stepped surface at the junction with the coupling portion 11. The positioning seat 32 is integrally formed at the junction of the sleeve portion 21 and the striking portion 22. The outer diameter of the positioning seat 32 is smaller than the outer diameter of the striking portion 22 and larger than the outer diameter of the sleeve portion 21, so that a stepped surface is formed between the positioning seat 32 and the sleeve portion 21 and the striking portion 22. The sleeve member 31 is spaced above the positioning seat 32. The shock-absorbing elastic member 33 is sleeved between the sleeve member 31 and the positioning seat 32 and abuts against the coupling portion 11 and the striking portion 22. The force-limiting member 34 is sleeved on the sleeve portion 21. When the coupling position of the locking portion 23 and the sleeve portion 21 is adjusted, the compression or expansion state of the shock-absorbing elastic member 33 of the force-limiting group 30 located between the striking portion 22 and the coupling portion 11 can be adjusted.

[0054] Furthermore, the shock-absorbing elastic member 33 is a spring having the same inner diameter (the upper and lower inner diameters are the same width) or different inner diameters (the upper part is wider and the lower part is narrower). When springs with the same inner diameter are used, the various parts of the spring may collide with each other, while when springs with different inner diameters are used, the various parts of the spring will not collide with each other.

[0055] Furthermore, the shock-absorbing elastic member 33 is an elastic member and can be made of an elastic material with a fixed shape, such as a spring, rubber, silicone, a metal gasket, an elastic metal block, or an elastic block. It can also be formed by enclosing a spring in rubber or silicone. Furthermore, the compression force of the shock-absorbing elastic member 33 can be set by selecting shock-absorbing elastic members 33 with different elastic strengths and pre-compressing the shock-absorbing elastic member 33 with the locking portion 23. During use, when the striking force is less than the pre-set compression force of the shock-absorbing elastic member 33, the user will feel the striking portion 22 produce an instant rebound; when the striking force is greater than the pre-set compression force of the shock-absorbing elastic member 33, the user will feel the striking portion 22 produce a delayed rebound. Therefore, by identifying whether the shock-absorbing elastic member 33 is compressed, the user can be reminded of the striking force, thereby providing a force-limiting reminder effect.

[0056] Preferably, please refer to Figure 3 As shown, the force limiting assembly 30 is further provided with at least one magnetic member 35 . The at least one magnetic member 35 is provided on the locking portion 23 and can be magnetically attracted to the coupling portion 11 , thereby providing a further force limiting reminder effect.

[0057] The force-limiting member 34 is an elastic member and can be made of an elastic material with a fixed shape, such as a spring, rubber, silicone, a metal gasket, an elastic metal block or an elastic block. It can also be formed by wrapping a spring in rubber or silicone. Furthermore, the force-limiting member 34 can be slidably mounted on the sleeve portion 21 or fixed on the sleeve portion 21; further, the force-limiting member 34 is fixed on the positioning seat 32 and is spaced apart from the sleeve 31, or is fixed on the sleeve 31 and is spaced apart from the positioning seat 32; preferably, a reminder element that emits light or sound can be provided on the force-limiting member 34. When the sleeve 31 and the force-limiting member 34 touch, the user can be reminded of the size of the force applied by light or sound.

[0058] Through the above technical features, the first preferred embodiment of the force limiting and shock absorbing device of the present invention can be a medical hammer or an industrial hammer, which can be used to knock an artificial tooth root into a patient's bone or knock a nail into a wooden board. Figure 1 As shown, the user holds and swings the gripping portion 12 of the body 10 to cause the striking portion 22 of the striking member 20 to strike the artificial tooth root or the nail body, wherein Figure 4 As shown, when the striking portion 22 hits the artificial tooth root or the nail body, a reaction force is generated. When the reaction force is smaller than the magnetic attraction between the magnetic element 35 and the coupling portion 11 plus the pre-compression force of the shock-absorbing elastic element 33, the locking portion 23 will not be separated from the coupling portion 11 along with the sleeve portion 21, and the sleeve portion 31 will not compress the shock-absorbing elastic element 33. The striking surface 221 of the striking portion 22 will not move relative to the coupling portion 11, and the striking portion 22 will be subjected to an instant rebound reaction force.

[0059] Furthermore, when the user Figure 4 As shown in the figure, when a larger knocking force is applied, the reaction force will be greater than the magnetic attraction between the magnetic member 35 and the joint portion 11, and when the pre-compression force of the shock-absorbing elastic member 33 is added, the knocking member 20 will move upward relative to the joint portion 11, so that the locking portion 23 is separated from the joint portion 11 along with the sleeve portion 21, and the shock-absorbing elastic member 33 will be compressed, so that the knocking energy is converted into the compression potential energy of the shock-absorbing elastic member 33, wherein as shown in the figure, Figure 5As shown, the body 10 will continue to move toward the nail body in the direction of the user's swing (i.e., it will not rebound temporarily). When the sleeve 31 compresses the force limiting member 34 as the body 10 moves, the compressed force limiting member 34 will prevent the striking surface 221 of the striking portion 22 from moving relative to the coupling portion 11, and the striking portion 22 will be subjected to an instant rebound reaction force.

[0060] Thus, by disposing the force limiting assembly 30 between the coupling portion 11 and the striking portion 22, not only can a delayed rebound effect of shock absorption and vibration reduction be generated for the reaction force, but also instant rebound is not generated during the striking process of the nail body, making it less likely for the nail body to bend, and the applied force can be continuously transmitted to the nail body, reducing energy loss and noise generation. The user only needs to strike the nail a few times to fix the nail body to the wooden board, thereby reducing the number of strikes and the required time, effectively improving the efficiency of the operation. Furthermore, the first preferred embodiment is a medical hammer. When using the medical hammer, the shock absorption and vibration reduction effect of the force limiting assembly 30 can reduce the discomfort of the user or patient, allowing the user to firmly hold the body 10 for striking. In addition, the force limiting assembly 30 not only provides shock absorption and vibration reduction effects, but also provides a reminder of the applied force through the force limiting member 34.

[0061] Furthermore, users can Figure 2 As shown, by rotating the locking portion 23 and separating it from the sleeve portion 21, and installing a force limiting group 30 (including a shock-absorbing elastic member 33 and a force limiting member 34) with different elastic strengths between the combining portion 11 and the striking portion 22, or as Figure 3 As shown, by rotating the locking portion 23 to change the distance between the coupling portion 11 and the striking portion 22 , the force limiting assembly 30 is made to present different compression states, so that the force limiting assembly 30 has different elastic tensions.

[0062] Through the above-mentioned technical features, when the force-limiting and shock-absorbing device of the present invention is used, it can not only provide a delayed rebound (Delayed Rebound) shock-absorbing and shock-absorbing effect of the reaction force through the force-limiting group 30 located between the coupling portion 11 and the striking portion 22, but also increase the contact time between the striking surface 221 of the striking portion 22 and the nail body, which not only makes it difficult for the nail body to bend, but also reduces energy loss and noise generation, relatively reduces the number of strikes and the required time, and can alleviate the discomfort of the user or patient, allowing the user to firmly hold the main body 10 for striking, and because of the streamlined structure, it only needs to replace the force-limiting group 30 with different elastic strengths or by rotating the locking portion 23 to provide different elastic tensions of the force-limiting group 30; in summary, the force-limiting and shock-absorbing device of the present invention is used At the beginning, it can be determined whether the locking portion 23 is separated from the connecting portion 11 as the first stage of force identification, and further it can be determined whether the fitting part 31 through the connecting portion 11 collides with the force limiting member 34 to generate resistance as the second stage of force identification. Finally, it can be determined whether the force limiting member 34 is compressed and immediately rebounds as the third stage of force identification. Therefore, the force limiting and shock absorbing device of the present invention can have a three-stage (triple) force limiting reminder effect when in use, thereby providing a force limiting and shock absorbing device with a reminder effect, improved vibration feeling and the ability to adjust the force application range as needed.

[0063] like Figure 6 The second preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figures 1 to 3 The difference from the first preferred embodiment shown is that: in the second preferred embodiment, the locking portion 23 can also be used without the magnetic attraction member 35, and can still provide a reminder effect and improve the vibration feeling through the shock-absorbing elastic member 33 and the force-limiting member 34A of the force-limiting group 30; further, the locking portion 23 can be matched with components such as gaskets, which are not limited here; further, the force-limiting member 34A can be slidably mounted on the sleeve portion 21 or fixed on the sleeve portion 21; further, the force-limiting member 34A is fixed on the positioning seat 32 and is spaced apart from the sleeve member 31, or is fixed on the sleeve member 31 and is spaced apart from the positioning seat 32.

[0064] Please refer to Figure 7 The third preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figures 1 to 3The difference of the first preferred embodiment shown is that the force limiting member 34B is provided with a limiting groove 341B, a receiving groove 342B, a limiting bolt 343B, a fixing member 344B and a pushing unit 345B, wherein the limiting groove 341B is annularly recessed on the outer surface of the sleeve portion 21B and has at least one inner inclined wall. Preferably, the limiting groove 341B is an annular groove, and the receiving groove 342B is radially formed on the coupling portion 11B. Further, the receiving groove 342B is provided with an internal thread at the outer end away from the sleeve hole 111B, and the limiting bolt 343B is movably provided on the receiving hole 111B. The limiting bolt 343B is arranged in the groove 342B and faces the sleeve portion 21B. The limiting bolt 343B is provided with an inclined surface that can be abutted against the inner inclined wall of the limiting groove 341B. The fixing member 344B is combined with the outer end of the accommodating groove 342B, thereby preventing the limiting bolt 343B from being separated from the coupling portion 11B. The pushing unit 345B is arranged in the accommodating groove 342B and is located between the fixing member 345B and the limiting bolt 343B, pushing the force limiting member 343B through the sleeve hole 111B and against the outer surface of the sleeve portion 21B. Preferably, the pushing unit 345B can be a spring.

[0065] When using the third preferred embodiment of the force limiting and shock absorbing device of the present invention, please refer to the following Figure 8 As shown, when the knocking portion 22B knocks the object and compresses the shock-absorbing elastic member 33B, the connecting portion 11B and the sleeve portion 21B will move relative to each other, causing the limiting groove 341B to move upward relative to the connecting portion 11B, wherein when the limiting groove 341B is connected to the accommodating groove 342B through the sleeve hole 111B, the limiting bolt 343B will be pushed by the pushing unit 345B and locked with the limiting groove 341B, allowing the inner inclined wall to abut against the inclined surface, thereby limiting the position of the knocking member 20B relative to the connecting portion 11B, thereby reminding the user that the force used has exceeded the limit The force range set by the shock-absorbing device provides the user with a force limit reminder effect; further, when the user's force exceeds the force range set by the force-limiting shock-absorbing device, and the limit bolt 343B is locked with the sleeve part 21B, when the user pushes the sleeve part 21B to move downward relative to the coupling part 11B, the limit bolt 343B is pushed by the sleeve part 21B and will move toward the direction of the fixing part 344B and retract into the accommodating groove 342B, so that the limit bolt 343B is separated from the limit groove 341B and returned to its initial position through the push of the shock-absorbing elastic part 33B.

[0066] Please refer to further Figure 9 The fourth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 7 and Figure 8The difference of the third preferred embodiment shown is that the force limiting member 34C is provided with a pull rod 346C, one end of the pull rod 346C is located outside the coupling portion 11C, and the other end is fixedly connected to the limiting bolt 343C via the fixing member 344C and the pushing unit 345C.

[0067] When using the fourth preferred embodiment of the force limiting and shock absorbing device of the present invention, please refer to the following Figure 9 and Figure 10 As shown, when the knocking part 22C knocks the object and drives the sleeve part 21C to move relative to the connecting part 11C, the limiting groove 341C will move upward relative to the connecting part 11C, and when the limiting groove 341C is connected with the accommodating groove 342C through the sleeve hole 111C, the limiting bolt 343C will be pushed by the pushing unit 345C and locked with the limiting groove 341C, so that the inner inclined wall and the inclined surface are abutted, thereby limiting the position of the knocking member 20C relative to the connecting part 11C, and the pull rod 346C will move toward the sleeve part 21C as the limiting bolt 343C moves, thereby reminding the user that the force used has exceeded the force range set by the force limiting shock absorbing device, providing a user with a sense of security. The user has a force-limiting reminder effect; further, when the user's force exceeds the force range set by the force-limiting shock-absorbing device, and the limit bolt 343C is locked with the sleeve part 21C, since the movement direction of the sleeve part 21C returning to the initial position does not correspond to the inclined direction of the limit bolt 343C, the user must pull the pull rod 346C to allow the limit bolt 343C to retract into the accommodating groove 342C toward the direction of the fixing part 344C as the pull rod 346C moves, so that the limit bolt 343C is separated from the limit groove 341C, and then the sleeve part 21C can be pushed downward relative to the coupling part 11C, and returned to the initial position through the push of the shock-absorbing elastic part 33C.

[0068] Please refer to Figure 11 The fifth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 7 and Figure 8The difference of the third preferred embodiment shown is that: the joint portion 11D is provided with a limit block 13D between the sleeve hole 111D and the sleeve portion 21D. Preferably, the limit block 13D is a bushing, the limit block 13D is provided in the sleeve hole 111D of the joint portion 11D and is penetrated by a through hole 131D, the limit block 13D is sleeved on the outside of the sleeve portion 21D through the through hole 131D, wherein there is a gap between the through hole 131D and the sleeve portion 21D, and one end of the shock-absorbing elastic member 33D is aligned with the limit block 13D. Furthermore, the force limiting member 34D is not provided with a limiting groove, and the limiting bolt 343D is pressed against the outer surface of the limiting block 13D at one end thereof toward the limiting block 13D; when the knocking portion 22D knocks the object and compresses the shock-absorbing elastic member 33D, the limiting block 13D and the limiting bolt 343D are pressed against each other and have friction, so that when the knocking portion 22D moves relative to the coupling portion 11D, the friction between the limiting block 13D and the limiting bolt 343D provides the shock-absorbing elastic member 33D with a force-limiting effect.

[0069] Please refer to further Figure 12 The sixth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 11 The difference of the fifth preferred embodiment shown is that: the force limiting member 34E is not provided with a fixing member and a pushing unit, the limiting bolt 343E is located in the accommodating groove 342E, and a magnetic member 14E is provided on the outer surface of the limiting block 13E, and the magnetic member 14E and the limiting bolt 343E are facing each other and magnetically attracted; wherein when the knocking part 22E knocks the object and compresses the shock-absorbing elastic member 33E, due to the magnetic attraction generated by the mutual attraction between the magnetic member 14E and the limiting bolt 343E, when the knocking part 22E moves relative to the coupling part 11E, the magnetic attraction between the limiting block 13E and the limiting bolt 343E will provide the shock-absorbing elastic member 33E with a force limiting effect.

[0070] Please refer to Figure 13 The seventh preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 12The difference of the sixth preferred embodiment shown is that: the coupling portion 11F is not provided with the limit block, and the limit groove 341F of the force limiting member 34F radially passes through the sleeve portion 21F, the magnetic member 14F is located in the limit groove 341F, and the limit bolt 343F is located in the accommodating groove 342F. When the sleeve portion 21F moves relative to the coupling portion 11F, the magnetic member 14F will correspond to the limit bolt 343F, wherein the limit bolt 343F is a magnetic block; when the knocking portion 22F knocks the object and compresses the shock-absorbing elastic member 33F, the magnetic member 14F will face the limit bolt 343F after the sleeve portion 21F moves relative to the coupling portion 11F, and generate a mutual magnetic attraction, and the magnetic attraction generated between the limit bolt 343F and the magnetic member 14F can provide the shock-absorbing elastic member 33F with a force limiting effect.

[0071] Please refer to Figure 14 The eighth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 6 The difference of the second preferred embodiment shown is that the force limiting member 34G is an elastic member and can be made of an elastic material with a fixed shape, such as a spring, rubber, silicone, a metal gasket, an elastic metal block or an elastic block. The spring can also be formed by wrapping a spring in rubber or silicone. It is sleeved on the sleeve portion 21G and located between the locking portion 23G and the coupling portion 11G, rather than between the sleeve portion 31G and the positioning seat 32G. When the knocking portion 22G knocks the object, when the shock-absorbing elastic member 33G is compressed, the locking portion 23G will move with the sleeve portion 21G to contact the force limiting member 34G. The compressed shock-absorbing elastic member 33G provides a restoring force to the striking portion 22G, thereby driving the locking portion 23G on the sleeve portion 21G to move toward the connecting portion 11G. The force-limiting member 34G located between the locking portion 23G and the connecting portion 11G can prevent the locking portion 23G from colliding with the connecting portion 11G during the striking process, thereby reducing damage caused by the collision. Furthermore, when the sleeve member 31G collides with the positioning seat 32G during the force application process, the user will feel an immediate rebound reaction force, which reminds the user of the striking force limit. When the user wants to strike with great force, the collision of the sleeve member 31G with the positioning seat 32G can achieve an unlimited force striking effect. Moreover, before the fitting 31G collides with the positioning seat 32G, the shock-absorbing elastic member 33G located between the striking portion 22G and the coupling portion 11G can avoid the immediate rebound reaction force at the beginning of the striking process, thereby reducing the occurrence of nail bouncing. Different force-limiting effects can be provided by adjusting the spacing between the fitting 31G and the positioning seat 32G and the elastic strength of the shock-absorbing elastic member 33G, and the device can also be used without using the force-limiting member 34G.

[0072] Please refer to Figure 15 The ninth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 11 The difference of the fifth preferred embodiment shown is that: the bottom of the limit block 13H extends out of the joint part 11H through the sleeve hole 111H, so that the shock-absorbing elastic member 33H is partially sleeved on the outside of the limit block 13H, and the force limiting member 34H is annularly provided with the limit groove 341H on the outer surface of the limit block 13H, so that the limit bolt 343H can abut against the limit block 13H through the limit groove 341H. Furthermore, the force limiting shock absorbing device is provided with an auxiliary elastic member 36H on the sleeve part 21H, and the auxiliary elastic member 36H is located between the shock-absorbing elastic member 33H and the positioning seat 32H, thereby further providing an auxiliary shock-absorbing effect.

[0073] Please refer to Figure 16 The tenth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 14 The difference of the eighth preferred embodiment shown is that: the sleeve 31I is a groove structure recessed into the joint portion 11I, the positioning seat 32I extends into the sleeve 31I through the bottom of the joint portion 11I, and the shock-absorbing elastic member 33I is sleeved on the outside of the positioning seat 32I and abuts between the joint portion 11I and the knocking portion 22I, and there is a distance between the sleeve 31I and the positioning seat 32I; when the knocking portion 22I knocks the object, the shock-absorbing elastic member 33I is compressed, and the shock-absorbing elastic member 33I provides the knocking The force of the locking portion 23I on the sleeve portion 21I is used to move toward the connecting portion 11I. The force limiting member 34I located between the locking portion 23I and the connecting portion 11I can prevent the locking portion 23I from colliding with the connecting portion 11I during the striking process, thereby reducing damage caused by the collision. Furthermore, when the sleeve portion 31I collides with the positioning seat 32I during the force application process, the user will feel an immediate rebound reaction force, which reminds the user of the striking force limit. When the user wants to strike with great force, the collision of the sleeve portion 31I with the positioning seat 32I can achieve an unlimited force striking effect. Moreover, before the fitting 31I collides with the positioning seat 32I, the shock-absorbing elastic member 33I located between the striking portion 22I and the coupling portion 11I can avoid the immediate rebound reaction force at the beginning of the striking process, thereby reducing the occurrence of nail bouncing. Different force-limiting effects can be provided by adjusting the spacing between the fitting 31I and the positioning seat 32I and the elastic strength of the shock-absorbing elastic member 33I, and the device can also be used without using the force-limiting member 34I.

[0074] Please refer to Figure 17The eleventh preferred embodiment of the force limiting and shock absorbing device of the present invention is shown. Figure 3 The difference of the first preferred embodiment shown is that the sleeve 31J is integrally or separately provided at the bottom of the coupling portion 11J and is located on one side of the sleeve portion 21J or is annularly provided on the outer periphery of the sleeve portion 21J, and the positioning seat 32J is integrally or separately provided on the knocking portion 22J and is located on one side of the sleeve portion 21J or is annularly provided on the outer periphery of the sleeve portion 21J, and is spaced apart from the sleeve 31J.

[0075] Please refer to Figure 18 The twelfth preferred embodiment of the force limiting and shock absorbing device of the present invention is shown in FIG. Figure 3 The difference from the first preferred embodiment shown is that the connecting portion 11K is transversely penetrated by a through-slot 112K. The sleeve portion 21K extends into the through-slot 112K through the bottom of the connecting portion 11K, and the locking portion 23K is coupled to the sleeve portion 21K through the through-slot 112K. The force-limiting member 34K is disposed between the connecting portion 11K and the locking portion 23K and within the through-slot 112K. When the striking force is too great, the locking portion 23K collides with the top of the through-slot 112K, reminding the user of the upper limit of the striking force and providing an unlimited force striking effect.

[0076] Furthermore, the shock-absorbing elastic members 33, 33B, 33C, 33D, 33E, 33F, 33G, 33H, 33I and the force-limiting members 34, 34A, 34G, 34I, 34K in the above-mentioned preferred embodiment can be made of elastic materials with fixed shapes, such as springs, rubber, silicone, metal gaskets, elastic metal blocks, or elastic blocks. Springs can also be formed by encapsulating rubber or silicone, or both can be used in combination with one of the aforementioned elastic materials. The present invention does not limit the combination method.

[0077] The above is merely a preferred embodiment of the present invention, which can be applied to the design of hammers, axes, golf club heads, and force-limiting and shock-absorbing structures of striking tools. It does not limit the present invention in any form. Any person skilled in the art who, without departing from the scope of the technical solution proposed by the present invention, makes partial changes or modifications to the technical content disclosed by the present invention to make equivalent embodiments, and without departing from the technical solution of the present invention, all of these remain within the scope of the technical solution of the present invention.

Claims

1. A force limiting and shock absorbing device, characterized in that: Features: A main body, which is a long rod, has a connecting portion at one end, the connecting portion has a set of holes, and a grip portion at one end of the main body away from the connecting portion; a striking member movably coupled to the body and capable of moving relative to the coupling portion, the striking member comprising a sleeve portion, a striking portion, and a locking portion; the sleeve portion movably coupled to the sleeve hole of the coupling portion; the striking portion being disposed at one end of the sleeve portion and below the coupling portion; and the locking portion being coupled to the sleeve portion and abutting against the coupling portion; a shock-absorbing elastic member, which is sleeved on the sleeve portion and abuts against the combining portion and the striking portion; and a force limiting group disposed between the striking member and the body, for reminding the user whether the striking force exceeds the force range set by the force-limiting and shock-absorbing device during striking. The force limiting group includes a force limiting member located between the sleeve portion and the coupling portion and not in contact with the shock-absorbing elastic member, thereby providing a force-limiting reminder effect and further shock-absorbing effect; The force limiting and shock absorbing device has a three-stage force limiting reminder effect when in use. It can identify the force in the first stage by judging whether the locking portion is separated from the connecting portion, and can also judge whether the connecting portion contacts the force limiting member to generate resistance as the second stage of force identification. It can also judge whether the force limiting member is compressed and immediately rebounds as the third stage of force identification.

2. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting group is provided with a fitting and a positioning seat. The fitting is integrally formed at the bottom of the coupling portion and is provided with a through hole communicated with the coupling hole. The positioning seat is integrally formed at the coupling portion and the knocking portion. The fitting is spaced apart above the positioning seat. The shock-absorbing elastic member is sleeved between the fitting and the positioning seat and abuts against the coupling portion and the knocking portion. The force limiting member is sleeved on the coupling portion and is located between the positioning seat and the fitting.

3. The force limiting and shock absorbing device according to claim 2, characterized in that: A reminder element emitting light or sound is provided on the force-limiting member. When the sleeve member contacts the force-limiting member, the user is reminded of the magnitude of the force applied by light or sound.

4. The force limiting and shock absorbing device according to claim 3, characterized in that: The force limiting assembly is provided with at least one magnetic attraction component, which is provided on the locking portion and can be magnetically attracted to the coupling portion, thereby providing a further force limiting reminder effect.

5. The force limiting and shock absorbing device according to claim 3 or 4, characterized in that: The force limiting member is a spring, annular rubber or silicone, an elastic metal block or an elastic block or bushing which is set on the sleeve portion and located between the sleeve and the positioning seat.

6. The force limiting and shock absorbing device according to claim 5, characterized in that: The force limiting member can be slidably sleeved on the sleeve portion.

7. The force limiting and shock absorbing device according to claim 6, characterized in that: The force limiting member is fixed on the positioning seat and is spaced apart from the sleeve member.

8. The force limiting and shock absorbing device according to claim 6, characterized in that: The force limiting member is fixed on the sleeve member and is spaced apart from the positioning seat.

9. The force limiting and shock absorbing device according to claim 5, characterized in that: The force limiting member is fixed on the sleeve portion.

10. The force limiting and shock absorbing device according to any one of claims 2 to 4, characterized in that: The force limiting member can be slidably sleeved on the sleeve portion.

11. The force limiting and shock absorbing device according to claim 10, characterized in that: The force limiting member is fixed on the positioning seat and is spaced apart from the sleeve member.

12. The force limiting and shock absorbing device according to claim 10, characterized in that: The force limiting member is fixed on the sleeve member and is spaced apart from the positioning seat.

13. The force limiting and shock absorbing device according to any one of claims 1 to 4, characterized in that: The force limiting member is fixed on the sleeve portion.

14. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting member is provided with a limiting groove, a receiving groove, a limiting bolt, a fixing member and a pushing unit, wherein the limiting groove is annularly recessed on the outer surface of the sleeve portion and has at least one inner inclined wall, the receiving groove is radially formed on the coupling portion, the limiting bolt is movably arranged in the receiving groove and faces the sleeve portion, the limiting bolt is provided with an inclined surface that can be abutted against the inner inclined wall of the limiting groove, the fixing member is combined with the outer end of the receiving groove, the pushing unit is provided in the receiving groove and is located between the fixing member and the limiting bolt, pushing the limiting bolt through the sleeve hole and against the outer surface of the sleeve portion.

15. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting member is provided with a limiting groove, a receiving groove, a limiting bolt, a fixing member, a pushing unit and a pull rod, wherein the limiting groove is annularly recessed in the outer surface of the sleeve portion and has at least one inner inclined wall, the receiving groove is radially formed on the coupling portion, the limiting bolt is movably arranged in the receiving groove and faces the sleeve portion, the limiting bolt is provided with an inclined surface that can be abutted against the inner inclined wall of the limiting groove, the fixing member is combined with the outer end of the receiving groove, the pushing unit is arranged in the receiving groove and is located between the fixing member and the limiting bolt, pushing the limiting bolt to abut against the outer surface of the sleeve portion through the sleeve hole, one end of the pull rod is located outside the coupling portion, and the other end is fixedly combined with the limiting bolt through the fixing member and the pushing unit.

16. The force limiting and shock absorbing device according to claim 1, characterized in that: The coupling portion is provided with a limit block between the sleeve hole and the sleeve portion, the limit block is fixedly mounted in the sleeve hole of the coupling portion and is penetrated by a through hole, the limit block is sleeved on the outside of the sleeve portion through the through hole, the force limiting member is provided with a receiving groove, a limit bolt, a fixing member and a pushing unit, the receiving groove is radially formed on the coupling portion and communicates with the sleeve hole, the limit bolt is movably arranged in the receiving groove and abuts against the outer surface of the limit block, the fixing member is combined with the outer end of the receiving groove, and the pushing unit is arranged in the receiving groove and is located between the fixing member and the limit bolt.

17. The force limiting and shock absorbing device according to claim 16, characterized in that: The limiting bolt is magnetic, and a magnetic piece is provided on the outer surface of the limiting block. The magnetic piece faces the limiting bolt and is magnetically attracted to it.

18. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting member is provided with a limiting groove, a receiving groove and a limiting bolt. The limiting groove radially penetrates the sleeve portion. The receiving groove is radially formed on the coupling portion. The limiting bolt is located in the receiving groove. The limiting bolt is magnetic. The sleeve portion is provided with a magnetic member located in the limiting groove. When the sleeve portion moves relative to the coupling portion, the magnetic member will correspond to the limiting bolt.

19. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting member is sleeved on the sleeve portion and located between the locking portion and the combining portion.

20. The force limiting and shock absorbing device according to claim 1, characterized in that: The striking portion of the striking piece is a spherical, flat, axe-shaped, curved or conical structure.

21. The force limiting and shock absorbing device according to claim 16, characterized in that: The bottom of the limit block extends out of the coupling portion through the sleeve hole, so that the shock-absorbing elastic member is partially sleeved on the outside of the limit block, and the force limiting member is provided with a limit groove in an annular shape on the outer surface of the shock-absorbing elastic member, so that the limit bolt can abut against the limit block through the limit groove.

22. The force limiting and shock absorbing device according to claim 21, characterized in that: The force limiting group is provided with a positioning seat at the junction of the sleeve portion and the knocking portion, and the force limiting shock absorbing device is provided with an auxiliary elastic member on the sleeve portion, and the auxiliary elastic member is located between the shock absorbing elastic member and the positioning seat.

23. The force limiting and shock absorbing device according to claim 19, characterized in that: The force limiting group is provided with a sleeve and a positioning seat. The sleeve is a groove structure recessed into the combining portion. The positioning seat is provided at the place where the sleeve and the knocking portion are combined, and extends into the sleeve through the bottom of the combining portion. The shock-absorbing elastic member is sleeved on the outside of the positioning seat and abuts between the combining portion and the knocking portion. There is a distance between the sleeve and the positioning seat.

24. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting group is provided with a sleeve and a positioning seat. The sleeve is provided at the bottom of the combination part and located on one side of the sleeve part. The positioning seat is provided on the knocking part and located on one side of the sleeve part and is spaced apart from the sleeve.

25. The force limiting and shock absorbing device according to claim 1, characterized in that: The force limiting group is provided with a sleeve and a positioning seat. The sleeve is arranged at the bottom of the combination part and is annularly arranged on the outer periphery of the sleeve. The positioning seat is arranged on the knocking part and is annularly arranged on the outer periphery of the sleeve and is spaced apart from the sleeve.

26. The force limiting and shock absorbing device according to claim 1, characterized in that: The coupling portion is laterally penetrated by a through slot, the sleeve portion extends into the through slot through the bottom of the coupling portion, and the locking portion is coupled to the sleeve portion through the through slot, the force limiting member is arranged between the coupling portion and the locking portion and located in the through slot.

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