Counterweight bolt and counterweight assembly

Abstract

This utility model discloses a counterweight pin and a counterweight assembly. The counterweight pin includes a handle, a pin, a circuit board assembly, and a weighing or bending sensor. The pin extends outward from the handle and can be inserted into a mounting hole in the counterweight. The circuit board assembly is disposed on the handle, and the weighing or bending sensor is disposed on the pin and connected to the circuit board assembly. When a user uses a weight-bearing fitness machine equipped with the counterweight assembly, the counterweight pin can determine the load based on the resistance value fed back by the weighing or bending sensor to monitor the user's fitness process.

Description

Technical Field

[0001] This utility model relates to a weight-bearing fitness device, and more particularly to a counterweight pin and a counterweight assembly. Background Technology

[0002] Weight training equipment is a common device used by users to assist with fitness. It provides multiple weight blocks and pins, allowing users to select different numbers of weight blocks and thus varying the load to achieve their desired fitness goals. Understandably, the energy consumed by a user per unit of time is related to the weight of the weight blocks and the speed at which they lift them. However, when using existing weight training equipment, users can only subjectively estimate their energy consumption per unit of time. This estimation relies on experience, and even experienced users often struggle to accurately estimate energy consumption, potentially leading to under- or over-exercising. In other words, existing weight training equipment cannot sense the user's energy consumption per unit of time, and therefore cannot provide intelligent assistance to the user's fitness process. Utility Model Content

[0003] One objective of this invention is to provide a counterweight pin and a counterweight assembly, wherein the pin of the counterweight pin is equipped with a weighing or bending sensor. When a user exercises using a weighted fitness equipment equipped with the counterweight assembly, the counterweight pin can obtain the weight of the user-selected counterweight based on the resistance value fed back by the weighing or bending sensor. Subsequently, various weight-related parameters, such as the energy consumed per unit time, can be obtained.

[0004] One objective of this invention is to provide a counterweight pin and a counterweight assembly, wherein when a user uses a weight-bearing fitness equipment equipped with the counterweight assembly, the accelerometer of the counterweight pin can obtain the speed and / or speed change of the user lifting the counterweight, and subsequently obtain various parameters related to the speed and / or speed change, thereby obtaining the energy consumed by the user per unit time.

[0005] One objective of this invention is to provide a counterweight pin and a counterweight assembly, wherein even after a user inserts the counterweight pin of this invention into the counterweight of an existing weight-bearing fitness equipment, the counterweight pin can still obtain the user's load data and / or lifting speed data when using the existing weight-bearing fitness equipment, thereby obtaining the energy consumed by the user per unit time. In other words, simply replacing the existing pins of the weight-bearing fitness equipment with the counterweight pin of this invention is sufficient to obtain the user's load data and / or lifting speed data during exercise, thus helping to reduce the cost of modifying weight-bearing fitness equipment and the cost of popularizing intelligent fitness equipment.

[0006] According to one aspect of the present invention, a counterweight pin is provided, comprising:

[0007] handle;

[0008] A pin, wherein the pin extends outward from the handle and can be inserted into a mounting hole of the counterweight;

[0009] Circuit board assembly, wherein the circuit board assembly is disposed on the handle; and

[0010] A weighing or bending sensor, wherein the weighing or bending sensor is disposed on the pin and the weighing or bending sensor is connected to the circuit board assembly.

[0011] According to one embodiment of the present invention, the pin has a pin receiving cavity and a wiring channel. The pin receiving cavity is located in the middle of the pin, and the wiring channel extends from the pin receiving cavity to the end of the pin where the handle is disposed. The weighing or bending sensor is disposed in the pin receiving cavity of the pin, and the wires for connecting the weighing or bending sensor and the circuit board assembly are routed in the wiring channel of the pin.

[0012] According to one embodiment of the present invention, the pin includes a first pin portion and a second pin portion, the first pin portion and the second pin portion being mounted to each other to form the pin receiving cavity and the wiring channel between the first pin portion and the second pin portion, and a gap is present between the weighing or bending sensor and the second pin portion.

[0013] According to one embodiment of the present invention, the first pin portion has a groove, the groove having a wider groove located in the middle of the first pin portion and a narrower groove extending from the wider groove to the end of the first pin portion, the second pin portion being disposed in the groove of the pin portion, the wider groove of the groove forming the pin receiving cavity of the pin between the first pin portion and the second pin portion, and the narrower groove of the groove forming the wiring channel of the pin between the first pin portion and the second pin portion.

[0014] According to one embodiment of the present invention, the handle has a handle receiving cavity and an insertion hole communicating with the handle receiving cavity, the circuit board assembly is received in the handle receiving cavity of the handle, and one end of the pin extends through the insertion hole of the handle to the handle receiving cavity.

[0015] According to one embodiment of the present invention, the handle includes a handle body and a handle cover. The handle body has a mounting groove, the insertion hole of the handle is formed in the handle body and the insertion hole communicates with the mounting groove of the handle body, the handle cover is disposed in the mounting groove of the handle body, and the handle forms a handle receiving cavity between the handle body and the handle cover.

[0016] According to one embodiment of the present invention, the circuit board assembly includes a circuit board and a battery and a processor disposed on the circuit board.

[0017] According to one embodiment of the present invention, the counterweight pin includes an accelerometer, which is mounted on the circuit board.

[0018] According to one embodiment of the present invention, the circuit board assembly includes an interface mounted on the circuit board, wherein the handle has an interface hole communicating with the handle receiving cavity, and the interface extends to the interface hole of the handle.

[0019] According to another aspect of the present invention, the present invention further provides a counterweight component, which includes:

[0020] A guide rod, wherein the guide rod is configured to extend in a vertical direction;

[0021] Multiple counterweights, wherein each counterweight is stacked and configured to be guided in a direction of movement by the guide rod, wherein each counterweight has a lifting through hole and an insertion hole, the lifting through hole penetrating the thickness direction of the counterweight, the insertion hole penetrating the width direction of the counterweight, and the lifting through hole and the insertion hole communicating with each other;

[0022] A lifting rod, wherein the lifting rod has a rod body through hole, the bottom end of the lifting rod being insertable into the lifting through hole of the counterweights, and the rod body through hole of the lifting rod communicating with the insertion hole of at least one of the counterweights; and

[0023] Counterweight pin, wherein the counterweight pin further comprises:

[0024] handle;

[0025] A pin, wherein the pin extends outward from the handle and can be inserted into a mounting hole of the counterweight;

[0026] Circuit board assembly, wherein the circuit board assembly is disposed on the handle; and

[0027] A weighing or bending sensor, wherein the weighing or bending sensor is disposed on the pin and the weighing or bending sensor is connected to the circuit board assembly, wherein the pin of the counterweight pin is configured to be inserted into the insertion hole of the counterweight and the rod through hole of the lifting rod. Attached Figure Description

[0028] Figure 1 This is a perspective view of a counterweight component according to a preferred embodiment of the present invention.

[0029] Figure 2 This is a front view schematic diagram of the counterweight component according to the above-described preferred embodiment of the present invention.

[0030] Figure 3 This is a cross-sectional schematic diagram of the counterweight component according to the above-described preferred embodiment of the present invention.

[0031] Figure 4 This is a perspective view of the counterweight block assembly of the counterweight component according to the above-described preferred embodiment of the present invention.

[0032] Figure 5 This is a top view schematic diagram of the counterweight block assembly of the counterweight assembly according to the above preferred embodiment of the present invention.

[0033] Figure 6 This is a side view of the counterweight block assembly of the counterweight assembly according to the above-described preferred embodiment of the present invention.

[0034] Figure 7 This is an exploded view of the counterweight block assembly of the counterweight assembly according to the above-described preferred embodiment of the present invention.

[0035] Figure 8This is an exploded view of the counterweight block assembly of the counterweight assembly according to the above-described preferred embodiment of the present invention.

[0036] Figure 9 This is a three-dimensional cross-sectional view of the counterweight block assembly of the counterweight assembly according to the above-described preferred embodiment of the present invention.

[0037] Figure 10 yes Figure 9 An enlarged diagram of one of the locations.

[0038] Figure 11 yes Figure 9 An enlarged view of another location.

[0039] Figure 12 This is a cross-sectional view of the counterweight block assembly of the counterweight assembly according to the above-described preferred embodiment of the present invention from a plan view perspective.

[0040] Figure 13 yes Figure 12 An enlarged diagram of one of the locations. Detailed Implementation

[0041] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0042] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0043] Reference Appendix Figures 1 to 13 A preferred embodiment of the present invention will be disclosed and described in the following description, wherein the counterweight assembly includes at least one guide rod 10, a plurality of counterweight blocks 20, a lifting rod 30 and a counterweight block pin 40.

[0044] The guide rod 10 is configured to extend vertically. Each counterweight 20 is stacked and configured to be guided in a direction of movement by the guide rod 10. Each counterweight 20 has a lifting through-hole 21 and an insertion hole 22 that are interconnected. The lifting through-hole 21 extends through the thickness direction of the counterweight 20, and the insertion hole 22 extends through the width direction of the counterweight 20. The lifting rod 30 has at least one rod body through-hole 31, the bottom of which can be inserted into the lifting through-hole 21 of the counterweights 20. The rod body through-hole 31 of the lifting rod 30 communicates with at least one insertion hole 22 of the counterweight 20. The counterweight pin 40 is configured to be inserted into the insertion hole 22 of the counterweight 20 and the rod body through-hole 31 of the lifting rod 30, allowing the user to select different numbers of counterweights 20. Once the counterweight 20 is selected, when the user lifts the lifting rod 30, the selected counterweight 20 and all the counterweights 20 located above it are lifted, thereby helping the user achieve the corresponding fitness goal.

[0045] Preferably, the center of mass of the counterweight 20 is located in the lifting hole 21 of the counterweight 20, so that when the user lifts the counterweight 20 through the lifting rod 30, the counterweight 20 can be prevented from tilting.

[0046] To facilitate the user's selection of an appropriate number of counterweights 20, in the counterweight assembly of this utility model, the lifting rod 30 has multiple rod body through holes 31, which are distributed at intervals along the extension direction of the lifting rod 30. When the user inserts the counterweight pin 40 into the insertion hole 22 of the desired counterweight 20 and any one of the rod body through holes 31 of the lifting rod 30, the desired counterweight 20 can be selected.

[0047] Reference Appendix Figures 1 to 3 The counterweight 20 has at least one guide hole 23 that extends through the thickness direction of the counterweight 20. The vertically extending guide rod 10 passes through the guide hole 23 of the counterweight 20, so that the guide rod 10 can guide the movement direction of the counterweight 20.

[0048] Preferably, in this specific example of the counterweight assembly of this utility model, there are two guide rods 10, which are distributed at intervals. The counterweight block 20 has two guide holes 23, which pass through the thickness direction of the counterweight block 20 at opposite ends. The two guide rods 10 pass through the two guide holes 23 of the counterweight block 20, so that when the user lifts the counterweight block 20 by the lifting rod 30, the counterweight block 20 can be prevented from rotating in the horizontal direction.

[0049] Continue to refer to the appendix Figures 1 to 3 The counterweight assembly includes a base 50, and two guide rods 10 extend upward from opposite sides of the base 50. The base 50 is located directly below the counterweights 20 and provides support for them. Preferably, the base 50 has a clearance hole 51, which is positioned opposite to the lifting through hole 21 of the counterweight 20. The clearance hole 51 of the base 50 is used to avoid the bottom of the lifting rod 30.

[0050] Appendix Figures 4 to 13 The specific structure of the counterweight pin 40 is shown. The counterweight pin 40 includes a handle 41, a pin 42, a circuit board assembly 43, and a weighing or bending sensor 44. The pin 42 extends outward from the handle 41, that is, the handle 41 is disposed at one end of the pin 42. The circuit board assembly 43 is disposed on the handle 41. The weighing or bending sensor 44 is disposed on the pin 42 and is connected to the circuit board assembly 43.

[0051] The user can operate the counterweight pin 40 through the handle 41. For example, the user can operate the counterweight pin 40 through the handle 41 to insert the pin 42 into the insertion hole 22 of the counterweight 20 and the rod through hole 31 of the lifting rod 30. Alternatively, the user can operate the counterweight pin 40 through the handle 41 to pull the pin 42 out of the insertion hole 22 of the counterweight 20 and the rod through hole 31 of the lifting rod 30. When the user inserts the pin 42 into the insertion hole 22 of the counterweight 20 and the rod through hole 31 of the lifting rod 30, the position of the weighing or bending sensor 44 of the counterweight pin 40 corresponds to the position of the lifting rod 30 in the height direction. Thus, when the user lifts the lifting rod 30 upwards, the weight exerted by the counterweight 20 on the pin 42 through the lifting rod 30 causes a change in the resistance of the weighing or bending sensor 44. Based on the resistance value fed back by the weighing or bending sensor 44, the counterweight pin 40 can obtain the weight of the counterweight 20 selected by the user. Subsequently, various weight-related parameters, such as the energy consumed per unit time, can be obtained to help the user achieve better fitness results. In some embodiments of the counterweight assembly of this utility model, the weighing or bending sensor 44 can be a deformation sensor, such as a deformation film sensor.

[0052] Furthermore, by placing the circuit board assembly 43 on the handle 41, after the user inserts the counterweight pin 40 into the insertion hole 22 of the counterweight 20 and the rod through hole 31 of the lifting rod 30, both the handle 41 and the circuit board assembly 43 are not subjected to force because the handle 41 is located to the side of the counterweight 20, thus protecting the circuit board assembly 43. At the same time, the handle 41 can have a larger size than the pin 42, therefore a larger circuit board assembly 43 can be selected to integrate more electronic components, which is beneficial for the counterweight pin 40 to provide more functions.

[0053] Furthermore, the pin 42 has a pin receiving cavity 421 and a wiring channel 422. The pin receiving cavity 421 is located in the middle of the pin 42, and the wiring channel 422 extends from the pin receiving cavity 421 to the end of the pin 42 where the handle 41 is located. The weighing or bending sensor 44 is disposed in the pin receiving cavity 421 of the pin 42, and the wire 45 for connecting the weighing or bending sensor 44 and the circuit board assembly 43 is routed in the wiring channel 422 of the pin 42. In this way, the weighing or bending sensor 44 and the wire 45 are not visually visible, which helps to protect the weighing or bending sensor 44 and the wire 45.

[0054] Specifically, in the counterweight assembly of this utility model, the pin 42 includes a first pin portion 423 and a second pin portion 424. The first pin portion 423 and the second pin portion 424 are mounted to each other to form the pin receiving cavity 421 and the wiring channel 422 between the first pin portion 423 and the second pin portion 424. The weighing or bending sensor 44 and the wire 45 are hidden between the first pin portion 423 and the second pin portion 424.

[0055] More specifically, see the appendix. Figure 7 The first pin portion 423 has a groove 4231, the groove 4231 having a wider groove 42311 located in the middle of the first pin portion 423 and a narrower groove 42312 extending from the wider groove 42311 to the end of the first pin portion 423. The weighing or bending sensor 44 is fixed to the first pin portion 423 in the wider groove 42311, and the wire 45 is laid in the narrower groove 4231 of the first pin portion 423. 2. Then, the second pin portion 424 is provided in the wider groove 42311 and the narrower groove 42312 of the first pin portion 423. In this way, the wider groove 42311 of the groove 4231 forms the pin receiving cavity 421 of the pin 42 between the first pin portion 423 and the second pin portion 424, and the narrower groove 42312 of the groove 4231 forms the wiring channel 422 of the pin between the first pin portion 423 and the second pin portion 424. It is understood that after the second pin portion 424 is disposed in the groove 4231 of the first pin portion 423, there is a gap 100 between the weighing or bending sensor 44 and the second pin portion 424, allowing the weighing or bending sensor 44 to bend slightly between the first pin portion 423 and the second pin portion 424, so that the resistance of the weighing or bending sensor 44 changes when the user lifts the lifting rod 30 upward.

[0056] It is worth mentioning that by providing the wider slot 42311 and the narrower slot 42322 in the first pin portion 423, not only can the requirement of placing the weighing or bending sensor 44 in the wider slot 42311 and arranging the wire 45 in the narrower slot 42322 of the first pin portion 423 be met, but the strength of the first pin portion 423 can also be guaranteed, thereby ensuring the weighing capacity of the pin 42, avoiding bending of the pin 42, and thus ensuring the reliability of the counterweight pin 40.

[0057] It is worth mentioning that the connection method between the first pin portion 423 and the second pin portion 424 is not limited in the counterweight assembly of this utility model, as long as the second pin portion 424 is reliably held in the groove 4231 of the first pin portion 423. For example, the first pin portion 423 and the second pin portion 424 can be welded, or the first pin portion 423 and the second pin portion 424 can be glued together.

[0058] Furthermore, the handle 41 has a handle receiving cavity 411 and an insertion hole 412 communicating with the handle receiving cavity 411. The circuit board assembly 43 is received in the handle receiving cavity 411 of the handle 41. One end of the pin 42 extends through the insertion hole 412 of the handle 41 to the handle receiving cavity 411. In this way, on the one hand, one end of the pin 42 can be disposed on the handle 41, so that the pin 42 extends outward from the handle 41. On the other hand, the wire 45 can extend directly from the wiring channel 422 of the pin 42 to the handle receiving cavity 411 of the handle 41, so that the wire 45 connects the circuit board assembly 43 and the weighing or bending sensor 44. Furthermore, the handle 41 can restrain the first pin portion 423 and the second pin portion 424 of the pin 42 in the entire circumferential direction, ensuring the stability of the connection relationship between the first pin portion 423 and the second pin portion 424.

[0059] Furthermore, the handle 41 includes a handle body 413 and a handle cover 414. The handle body 413 has a mounting groove 4131. The insertion hole 412 of the handle 41 is formed in the handle body 413, and the insertion hole 412 communicates with the mounting groove 4131 of the handle body 413. After the circuit board assembly 43 is disposed in the mounting groove 4131 of the handle body 413, the handle cover 414 is placed on the handle body 413 to close the opening of the mounting groove 4131 of the handle body 413. In this way, the handle 41 forms a handle receiving cavity 411 between the handle body 413 and the handle cover 414 to receive the circuit board assembly 43.

[0060] Reference Appendix Figure 6 , Figure 7 , Figure 8 and Figure 9The circuit board assembly 43 includes a circuit board 431, a battery 432, and a processor 433 (e.g., an MCU) disposed on the circuit board 431. The battery 432 can power the processor 433 through the circuit board 431. The weighing or bending sensor 44 is connected to the circuit board 431 via the wire 45. In some embodiments of the counterweight assembly of this invention, the processor 433 can be a near-field communication module integrating a Bluetooth module or a Wi-Fi module. Thus, the processor 433 can feed back the resistance value fed back by the weighing or bending sensor 44, or the processing result of the processor 433 based on the resistance value fed back by the weighing or bending sensor 44, to an external computing device via the near-field communication module. In other embodiments of the counterweight assembly of this invention, a separate near-field communication module can also be mounted on the circuit board 431.

[0061] Continue to refer to the appendix Figure 7 , Figure 9 and Figure 10 The counterweight pin 40 further includes an accelerometer 46, which can be mounted on the circuit board 431 of the circuit board assembly 43. When a user exercises with the weighted fitness equipment equipped with the counterweight assembly, the accelerometer 46 of the counterweight pin 40 can obtain the speed and / or speed change of the user lifting the counterweight 20, and subsequently obtain the speed and / or speed change. Optionally, in other examples of the counterweight assembly of this utility model, the accelerometer 46 can also be set on the pin 42. In this case, the accelerometer 46 and the circuit board 431 need to be connected by the wire 45.

[0062] Furthermore, the circuit board assembly 43 includes an interface 434, which is mounted on the circuit board 431. The handle 41 has an interface hole 415 that communicates with the handle receiving cavity 411. The interface 434 extends to the interface hole 415 of the handle 41. In this way, the external power supply 200 can supply power to the battery 432 via the interface 434 and the circuit board 431.

[0063] Further, please refer to the appendix. Figures 7 to 10 , Figure 12The counterweight pin 40 includes a ring 47, which is fitted onto the end of the pin 42 for insertion into the insertion hole 412 of the handle 41. On one hand, the ring 47 can restrain the first pin portion 423 and the second pin portion 424 of the pin 42 in the entire circumferential direction, ensuring the stability of the connection between the first pin portion 423 and the second pin portion 424. On the other hand, the ring 47 can adjust the length of the portion of the pin 42 located outside the handle 41 to meet the length requirements of different manufacturers for the portion of the pin 42 located outside the handle 41. Preferably, the handle body 413 has a handle groove 4132, and the ring 47 is located in the handle groove 4132 of the handle body 41.

[0064] Specifically, one end of the first pin portion 423 has a first insertion section 4230, and one end of the second pin portion 424 has a second insertion section 4240. The first insertion section 4230 of the first pin portion 423 and the second insertion section 4240 of the second pin portion 424 are used to form an insertion end 4201 of the pin 42. The outer diameter of the insertion end 4201 of the pin 42 is smaller than the outer diameter of the main body portion 4202. The ring body 47 has a ring body through hole 471, and the inner diameter of the ring body 47 is... The outer diameter of the insertion end 4201 of the pin 42 is the same as that of the ring body 47. The insertion end 4201 of the pin 42 passes through the ring body through hole 471 of the ring body 47 so that the ring body 47 is fitted onto the end of the pin 42 for insertion into the insertion hole 412 of the handle 41. In this way, the ring body 47 can restrain the first insertion segment 4230 of the first pin portion 423 and the second insertion segment 4240 of the second pin portion 424, ensuring that the first pin portion 423 and the second pin portion 424 are reliably installed. Preferably, the ring body 47 is a metal ring or an alloy ring to ensure the structural strength of the ring body 47. When assembling the counterweight pin 40, the length of the portion of the pin 42 located outside the handle 41 can be adjusted by replacing the ring body 47 of different sizes to meet the length requirements of different manufacturers for the portion of the pin 42 located outside the handle 41.

[0065] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A counterweight pin, characterized in that, include: handle; A pin, wherein the pin extends outward from the handle and can be inserted into a mounting hole of the counterweight; A circuit board assembly, wherein the circuit board assembly is disposed on the handle; as well as A weighing or bending sensor, wherein the weighing or bending sensor is disposed on the pin and the weighing or bending sensor is connected to the circuit board assembly.

2. The counterweight pin according to claim 1, wherein the pin has a pin receiving cavity and a wiring channel, the pin receiving cavity being located in the middle of the pin, the wiring channel extending from the pin receiving cavity to the end of the pin on which the handle is disposed, wherein the weighing or bending sensor is disposed in the pin receiving cavity of the pin, and the wires for connecting the weighing or bending sensor and the circuit board assembly are routed in the wiring channel of the pin.

3. The counterweight pin according to claim 2, wherein the pin includes a first pin portion and a second pin portion, the first pin portion and the second pin portion are mounted to each other to form the pin receiving cavity and the wiring channel between the first pin portion and the second pin portion, and a gap exists between the weighing or bending sensor and the second pin portion.

4. The counterweight pin according to claim 3, wherein the first pin portion has a groove, the groove having a wider groove located in the middle of the first pin portion and a narrower groove extending from the wider groove to the end of the first pin portion, the second pin portion being disposed in the groove of the pin portion, the wider groove of the groove forming the pin receiving cavity of the pin between the first pin portion and the second pin portion, and the narrower groove of the groove forming the wiring channel of the pin between the first pin portion and the second pin portion.

5. The counterweight pin according to any one of claims 1 to 4, wherein the handle has a handle receiving cavity and an insertion hole communicating with the handle receiving cavity, the circuit board assembly is received in the handle receiving cavity of the handle, and one end of the pin extends through the insertion hole of the handle to the handle receiving cavity.

6. The counterweight pin according to claim 5, wherein the handle includes a handle body and a handle cover, the handle body has a mounting groove, the insertion hole of the handle is formed in the handle body and the insertion hole communicates with the mounting groove of the handle body, the handle cover is disposed in the mounting groove of the handle body, and the handle forms the handle receiving cavity between the handle body and the handle cover.

7. The counterweight pin according to claim 5, wherein the circuit board assembly includes a circuit board and a battery and processor disposed on the circuit board.

8. The counterweight pin according to claim 7, wherein the counterweight pin includes an accelerometer, the accelerometer being mounted on the circuit board.

9. The counterweight pin of claim 7, wherein the circuit board assembly includes an interface mounted on the circuit board, wherein the handle has an interface hole communicating with the handle receiving cavity, and the interface extends to the interface hole of the handle.

10. A counterweight assembly, characterized in that, include: A guide rod, wherein the guide rod is configured to extend in a vertical direction; Multiple counterweights, wherein each counterweight is stacked and configured to be guided in a direction of movement by the guide rod, wherein each counterweight has a lifting through hole and an insertion hole, the lifting through hole penetrating the thickness direction of the counterweight, the insertion hole penetrating the width direction of the counterweight, and the lifting through hole and the insertion hole communicating with each other; A lifting rod, wherein the lifting rod has a rod body through hole, the bottom end of the lifting rod being insertable into the lifting through hole of the counterweights, and the rod body through hole of the lifting rod communicating with the insertion hole of at least one of the counterweights; and According to any one of claims 1 to 9, the pin of the counterweight pin is configured to be inserted into the insertion hole of the counterweight and the through hole of the lifting rod.

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