Magnet transfer jig
By using an elastic layer to cover the fourth end face of the inner core in the magnet transfer fixture, the problem of hand fatigue for users of existing fixtures is solved, achieving greater user comfort and convenience.
Patent Information
- Application Number
- CN202422913191.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing magnetic transfer jigs are not very comfortable because users' hands are easily fatigued or uncomfortable after prolonged or repeated use.
A magnet transfer fixture was designed, in which the inner core can be switched between a retracted position and an extended position. The fourth end face is covered by an elastic layer. The user drives the movement of the inner core by pressing the elastic layer, reducing direct contact with the fourth end face of the hard inner core.
It improves user comfort, reduces hand fatigue or discomfort after prolonged use, and enhances user convenience and comfort.
Smart Images
Figure CN223666468U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a loudspeaker assembling technical field especially relates to a magnet transfer fixture. BACKGROUND
[0002] The loudspeaker magnet is the core component in the loudspeaker (speaker), and is used for interacting with the voice coil to drive the diaphragm to vibrate, thereby generating sound. During the assembling process of the loudspeaker, the loudspeaker magnet needs to be placed on the loudspeaker seat, and then the loudspeaker magnet and the loudspeaker seat are bonded and fixed. In order to facilitate the taking and placing of the magnet, a fixture for transferring the magnet or magnetic object exists in the prior art, and the user can first use the fixture to attract the magnet, and then transfer the fixture and the magnet to the position where the magnet needs to be placed; subsequently, the user can press the inner core of the fixture, so that the inner core pushes out the magnet, thereby separating the magnet and the fixture from each other. However, the comfort of using the fixture is not high, and the user's hands are prone to fatigue or uncomfortable feeling after long-time or multiple uses of the fixture. SUMMARY
[0003] The utility model aims at solving one of the technical problems existing in the prior art. To this end, the utility model provides a magnet transfer fixture, which has high comfort during use and is beneficial to reducing the fatigue or discomfort of the user's hands.
[0004] The magnet transfer fixture according to the utility model embodiment comprises an outer cylinder, the outer surface of the outer cylinder comprises a first end face and a second end face which are opposite to each other, the first end face can attract the magnet; an inner core, the outer cylinder is sleeved on the outer periphery of the inner core, the inner core comprises a third end face and a fourth end face which are opposite to each other, the third end face does not attract the magnet, the inner core can move relative to the outer cylinder, thereby switching between a retracted position and an extended position; an elastic layer, connected with the fourth end face and covering the fourth end face, when the elastic layer is pressed, the inner core can move from the retracted position to the extended position; when the inner core is in the retracted position, part of the inner core extends from the second end face to the outside of the outer cylinder, the fourth end face and the elastic layer are located outside the outer cylinder, the fourth end face is spaced apart from the second end face, and the third end face is located inside the outer cylinder or flush with the first end face; when the inner core is in the extended position, part of the inner core extends from the first end face to the outside of the outer cylinder, and the third end face is located outside the outer cylinder, and in the axial direction of the inner core, the third end face is spaced apart from the first end face.
[0005] According to the magnet transfer jig, at least the following beneficial effects are achieved: the fourth end face is covered by the elastic layer, so that when the inner core is driven to move to the extended position, the user directly contacts the elastic layer instead of directly contacting the fourth end face of the inner core.
[0006] According to some embodiments of the present application, the elastic layer comprises a covering portion and a peripheral portion, the covering portion covers the fourth end face, the peripheral portion is connected to the outer periphery of the covering portion and surrounds the covering portion, and the peripheral portion is sleeved on the outer periphery of the inner core.
[0007] According to some embodiments of the present application, the magnet transfer jig further comprises a reset member, the reset member has elasticity, the outer cylinder and the inner core are connected with the reset member, when the pressing of the elastic layer is released, the elastic force of the reset member can drive the inner core to move from the extended position to the retracted position, and the elastic force of the reset member is also used to keep the inner core in the retracted position.
[0008] According to some embodiments of the present application, the inner core comprises a first shaft shoulder and a second shaft shoulder which are opposite to each other, the inner wall surface of the outer cylinder comprises a connecting surface and a limiting surface, the connecting surface and the limiting surface are respectively located at two ends of the outer cylinder, the reset member is located inside the outer cylinder, and the reset member is located at one end of the outer cylinder away from the second end face, the reset member is sleeved on the outer periphery of the inner core, and the two ends of the reset member are respectively in abutment with the first shaft shoulder and the connecting surface, when the inner core is in the retracted position, the elastic force of the reset member keeps the second shaft shoulder in abutment with the limiting surface.
[0009] According to some embodiments of the present application, the outer cylinder comprises a main body and an end cover, the end cover is detachably connected with the main body, the reset member is located inside the outer cylinder, and the two ends of the reset member are respectively connected with the inner core and the end cover.
[0010] According to some embodiments of the present application, the outer cylinder is in a cylindrical shape, the outer diameter of the outer cylinder is D, and 8mm≤D≤20mm; and / or, the length of the outer cylinder in the axial direction of the inner core is L1, and 100mm≤L1≤150mm.
[0011] According to some embodiments of the present application, when the inner core is in the extended position, in the axial direction of the inner core, the distance between the first end face and the third end face is L2, and 6mm≤L2≤20mm.
[0012] According to some embodiments of the present application, the first end face is a ring-shaped plane, and the third end face is a circular plane; and / or, the second end face is a ring-shaped plane, and the fourth end face is a circular plane, and the part of the elastic layer covering on the fourth end face is in a plane shape.
[0013] According to some embodiments of the present application, the material of the outer cylinder is iron; and / or, the material of the inner core is one of zinc, aluminum and copper; and / or, the material of the elastic layer is polyurethane.
[0014] According to some embodiments of the present application, the magnet transfer jig comprises: an outer cylinder, an outer surface of the outer cylinder comprises a first end face and a second end face which are opposite to each other, the first end face can be attracted to the magnet; an inner core, the inner core is made of elastic material, the outer cylinder is sleeved on the outer periphery of the inner core, the inner core comprises a third end face and a fourth end face which are opposite to each other, the third end face is not attracted to the magnet, the inner core can move relative to the outer cylinder so as to switch between a retracted position and an extended position, when the fourth end face is pressed, the inner core can move from the retracted position to the extended position;
[0015] When the inner core is in the retracted position, a part of the inner core extends from the second end face to the outside of the outer cylinder, the fourth end face is located outside the outer cylinder, the fourth end face is arranged in a spaced manner with the second end face, and the third end face is located inside the outer cylinder or is flush with the first end face; when the inner core is in the extended position, a part of the inner core extends from the first end face to the outside of the outer cylinder, the third end face is located outside the outer cylinder, and the third end face is arranged in a spaced manner with the first end face in the axial direction of the inner core.
[0016] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0017] The present application will be further described below in combination with the drawings and embodiments, in which:
[0018] Figure 1 FIG. 1 is a schematic view of a magnet transfer jig (the inner core is in the retracted position) according to an embodiment of the present application;
[0019] Figure 2 FIG. 2 is an exploded view of the magnet transfer jig shown in FIG. 1; Figure 1
[0020] Figure 3 FIG. 3 is a sectional view of the magnet transfer jig with the inner core in the retracted position;
[0021] Figure 4 A sectional view of the magnet transfer jig when the inner core is in the extended position;
[0022] Figure 5 A sectional view of the magnet transfer jig when the inner core is in the extended position; Figure 3 An enlarged view of the A region in the middle.
[0023] Reference signs: 101-magnet transfer jig, 102-outer cylinder, 103-inner core, 104-third end face, 105-first end face, 106-second shaft shoulder, 107-first shaft shoulder, 108-resetting member, 109-main body, 110-end cover, 111-elastic layer, 112-limiting surface, 113-connecting surface, 114-second end face, 115-covering part, 116-peripheral part, 117-fourth end face. DETAILED DESCRIPTION
[0024] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0025] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application. The device or element indicated is not necessarily constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.
[0026] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0027] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.
[0028] Figures 1 to 5 A magnet transfer jig 101 of one embodiment of the present application is shown, which includes an outer cylinder 102, an inner core 103, and an elastic layer 111. As shown in FIG. 1, the magnet transfer jig 101 includes an outer cylinder 102, an inner core 103, and an elastic layer 111. Figure 1 and Figure 2As shown, the outer cylinder 102 is sleeved on the outer periphery of the inner core 103. The inner core 103 is movable relative to the outer cylinder 102, so as to switch between a retracted position and an extended position. In Figure 3 , the inner core 103 is located at the retracted position; in Figure 4 , the inner core 103 is located at the extended position. More specifically, the inner core 103 can move linearly, and the retracted position is located above the extended position. As shown, Figure 3 , the elastic layer 111 is connected to one end of the inner core 103, and when the elastic layer 111 is pressed, the inner core 103 can move from the retracted position to the extended position.
[0029] As shown, Figure 3 , the outer surface of the outer cylinder 102 includes a first end surface 105 and a second end surface 114, which are opposite to each other. For example, the first end surface 105 is the bottom surface of the outer cylinder 102, and the second end surface 114 is the top surface of the outer cylinder 102. The first end surface 105 can be mutually attracted by a magnet, for example, the outer cylinder 102 is made of iron, and the outer cylinder 102 can be made of iron or a magnet without magnetism. The inner core 103 includes a third end surface 104 and a fourth end surface 117, which are opposite to each other, the third end surface 104 is the bottom surface of the inner core 103, and the fourth end surface 117 is the top surface of the inner core 103 (as shown, Figure 5 ). The third end surface 104 is not mutually attracted by a magnet. For example, the inner core 103 is made of one of zinc, aluminum, and copper, which are metal materials that are not mutually attracted by a magnet and have high structural strength; for another example, the inner core 103 can also be made of plastic or other non-metallic materials that are not mutually attracted by a magnet. For another example, the inner core 103 can be made of some steel materials that are not mutually attracted by a magnet. The elastic layer 111 is connected to and covers the fourth end surface 117. The elastic layer 111 can be made of rubber, plastic with elasticity, or the like. More specifically, in one embodiment, the material of the elastic layer 111 can be polyurethane (PU), and the elastic layer 111 is formed on the fourth end surface 117 by spraying.
[0030] The use mode of the magnet transfer jig 101 will be described below. The magnet transfer jig 101 can be used to transfer a loudspeaker magnet (not shown) so as to improve the assembly efficiency of the loudspeaker. The loudspeaker magnet is usually in the shape of a circular ring. Of course, the magnet transfer jig 101 can also be used to transfer other magnets. Hereinafter, the use mode of the magnet transfer jig 101 will be introduced by taking the loudspeaker magnet as the magnet to be transferred.
[0031] As shown, Figure 3As shown, before the magnet is adsorbed by the magnet transfer tool 101, the inner core 103 is in the retracted position. At this time, a part of the inner core 103 extends from the second end face 114 to the outside of the outer cylinder 102, the fourth end face 117 and the elastic layer 111 are located outside the outer cylinder 102, and the fourth end face 117 is arranged in a spaced manner with the second end face 114, so that the user can subsequently switch the inner core 103 to the extended position by pressing the elastic layer 111. Moreover, when the inner core 103 is in the retracted position, the third end face 104 is flush with the first end face 105, so as to prevent the third end face 104 from hindering the mutual attraction between the first end face 105 and the horn magnet.
[0032] When the inner core 103 is kept in the retracted position, the user can move the magnet transfer tool 101 above the horn magnet, so that the first end face 105 and the horn magnet are attracted to each other. Subsequently, the user can move the magnet transfer tool 101 above an object (for example, a horn seat) which needs to accommodate the horn magnet. Next, the user presses the elastic layer 111 with fingers to drive the inner core 103 to move to the extended position (the inner core 103 moves downward), so that the inner core 103 pushes the horn magnet into the horn seat.
[0033] When the inner core 103 is in the extended position, the magnet transfer tool 101 is in the state as shown in FIG. 4. At this time, a part of the inner core 103 extends from the first end face 105 to the outside of the outer cylinder 102, and the third end face 104 is located outside the outer cylinder 102. In the axial direction of the inner core 103, the third end face 104 is arranged in a spaced manner with the first end face 105. Therefore, during the process of switching the inner core 103 to the extended position, the third end face 104 gradually extends relative to the first end face 105, and the third end face 104 gradually pushes the horn magnet away from the first end face 105, so as to finally separate the horn magnet and the first end face 105 from each other. Figure 4 In the prior art, the user usually directly contacts the fourth end face 117 when driving the inner core 103 to move. Since the inner core 103 is usually made of relatively hard material, the user is prone to fatigue and finger pain or other uncomfortable feelings after pressing the inner core 103 for many times. However, for the magnet transfer tool 101 of the present application, since the fourth end face 117 is covered by the elastic layer 111, the user directly contacts the elastic layer 111 when driving the inner core 103 to move to the extended position, instead of directly contacting the fourth end face 117 of the inner core 103. The elastic layer 111 is softer and has elasticity, and the elastic layer 111 is beneficial to improve the comfort of the user when pushing the inner core 103, so as to reduce the fatigue or discomfort of the user's hands after long-time use of the tool.
[0034] As described above, in the process of switching the inner core 103 to the extended position, the user can press the elastic layer 111 to drive the inner core 103 to move to the extended position, so that the inner core 103 pushes the horn magnet into the horn seat.
[0035] Figure 3 In the illustrated embodiment, the third end surface 104 is flush with the first end surface 105 when the inner core 103 is in the retracted position. In order to prevent the third end surface 104 from interfering with the mutual attraction between the first end surface 105 and the horn magnet, in other embodiments not illustrated, the third end surface 104 can also not be flush with the first end surface 105 when the inner core 103 is in the retracted position, and the third end surface 104 is located inside the outer cylinder 102. That is, the third end surface 104 is spaced above the first end surface 105. As long as the third end surface 104 does not protrude outside the outer cylinder 102 relative to the first end surface 105 when the inner core 103 is in the retracted position, the third end surface 104 can be prevented from interfering with the mutual attraction between the first end surface 105 and the horn magnet.
[0036] In addition, in other embodiments not illustrated, in order to reduce the fatigue or discomfort after the tool is used for a long time, the magnet transfer tool 101 can also not be provided with the elastic layer 111, and the inner core 103 can be directly made of an elastic material (e.g., rubber), and the fourth end surface 117 itself can have elasticity. When the fourth end surface 117 is pressed, the inner core 103 can move from the retracted position to the extended position. This design also sets the part of the tool that is pressed by the user to be the part with elasticity, thereby reducing the fatigue or discomfort after the tool is used for a long time.
[0037] The details of the magnet transfer tool 101 will be described below.
[0038] In order to facilitate the user to hold and improve the holding comfort of the magnet transfer tool 101, the outer cylinder 102 can be cylindrical. Correspondingly, the shape of the inner core 103 is adapted to the shape of the outer cylinder 102, and the inner core 103 is substantially cylindrical. In the case where the inner core 103 is cylindrical, the second end surface 114 is an annular plane, the fourth end surface 117 is a circular plane, and the part (i.e., the covering portion 115 described below) of the elastic layer 111 covering the fourth end surface 117 is planar.
[0039] The horn magnet (not shown) is annular, and the end surface of the horn magnet is an annular plane. In order to make the magnet transfer tool 101 suitable for taking and placing the horn magnet, the first end surface 105 for mutual attraction with the horn magnet can be set as an annular plane. The third end surface 104 is set as a circular plane so that the inner core 103 can pass out of the hole surrounded by the first end surface 105.
[0040] As Figure 5As shown, the elastic layer 111 can include a covering portion 115 and a peripheral portion 116. The covering portion 115 covers the fourth end surface 117, and the peripheral portion 116 is connected to the outer periphery of the covering portion 115 and surrounds the covering portion 115. The peripheral portion 116 is annular, and the peripheral portion 116 is sleeved on the outer periphery of the inner core 103. Since the peripheral portion 116 is also connected to the inner core 103, the connection between the elastic layer 111 and the inner core 103 is more secure, and the elastic layer 111 is less likely to fall off the inner core 103. Moreover, the peripheral portion 116 can also cover the junction between the fourth end surface 117 of the inner core 103 and the outer peripheral surface of the inner core 103, preventing the user from directly contacting the junction with the hand and thus preventing the feeling of pinching the hand. That is, the elastic layer 111 composed of the covering portion 115 and the peripheral portion 116 can also improve the comfort of the user when operating the magnet transfer jig 101. As shown in Figure 5 To save the material of the elastic layer 111 and thus save costs, the length L3 of the peripheral portion 116 in the axial direction of the inner core 103 is not greater than 5 mm.
[0041] As shown in Figure 3 The magnet transfer jig 101 also includes a reset member 108, and the reset member 108 has elasticity. For example, the reset member 108 is provided as a spring. Both the outer cylinder 102 and the inner core 103 are connected to the reset member 108. When the pressing of the elastic layer 111 is released, the elastic force of the reset member 108 can drive the inner core 103 to move from the extended position to the retracted position. In the case where the reset member 108 is provided, the user only needs to release the fingers pressing the elastic layer 111 to reset the inner core 103 to the retracted position, and the user does not need to manually pull the reset member 108 upward to the retracted position. In addition, the elastic force of the reset member 108 is also used to keep the inner core 103 in the retracted position. During the process in which the user moves the magnet transfer jig 101 to the position of the horn magnet to be picked up, the user only needs to hold the outer cylinder 102, and the user does not need to hold the inner core 103 and keep the inner core 103 in the retracted position. Therefore, the provision of the reset member 108 is conducive to improving the convenience of use of the magnet transfer jig 101 and reducing the fatigue of the user after long-time use of the magnet transfer jig 101.
[0042] One of the installation modes of the reset member 108 is shown in Figure 3 and Figure 4The inner core 103 includes a first shoulder 107 and a second shoulder 106 opposite to each other, and the inner wall surface of the outer cylinder 102 includes a connecting surface 113 and a limiting surface 112, which are respectively located at two ends of the outer cylinder 102. The reset member 108 is located inside the outer cylinder 102 and at an end of the outer cylinder 102 away from the second end surface 114. The reset member 108 is sleeved on the outer periphery of the inner core 103, and two ends of the reset member 108 are respectively in abutment with the first shoulder 107 and the connecting surface 113. When the inner core 103 is in the retracted position, the elastic force of the reset member 108 makes the second shoulder 106 abut against the limiting surface 112.
[0043] In Figure 3 and Figure 4 , the reset member 108 is in a compressed state. As Figure 3 shown, at this time, the reset member 108 exerts an upward elastic force on the inner core 103, which has a tendency to drive the inner core 103 to move upward, so that the second shoulder 106 of the inner core 103 keeps abutting against the limiting surface 112 of the outer cylinder 102. The limiting surface 112 is used to limit the movement of the inner core 103 so as to prevent the inner core 103 from completely separating from the outer cylinder 102. As Figure 4 shown, after the elastic layer 111 is pressed, the inner core 103 moves downward, the compression degree of the reset member 108 increases, and the second shoulder 106 and the limiting surface 112 are separated from each other. After the user releases the hand, the elastic force of the reset member 108 drives the inner core 103 to move upward, so that the inner core 103 returns to the retracted position as Figure 3 shown.
[0044] The mounting mode of the reset member 108 is not limited to the forms shown in Figure 3 and Figure 4 . For example, in other embodiments not shown, the reset member 108 is located inside the outer cylinder 102 and at the top of the outer cylinder 102, the reset member 108 is always in a stretched state, two ends of the reset member 108 are respectively connected with the outer cylinder 102 and the inner core 103, and the pulling force exerted by the reset member 108 on the inner core 103 (the pulling force is vertically upward) drives the inner core 103 to reset to the retracted position and keeps the inner core 103 in the retracted position. The specific mounting mode of the reset member 108 is not listed one by one here.
[0045] As Figure 3As shown, the outer cylinder 102 includes a main body 109 and an end cap 110. The end cap 110 is detachably connected to the main body 109. The two ends of the reset member 108 are connected to the inner core 103 and the end cap 110, respectively. After prolonged use, the reset member 108 and the inner core 103 of the magnet transfer fixture 101 may be damaged. When the user needs to replace the reset member 108 or the inner core 103, the user can remove the end cap 110. During daily use, the end cap 110 is connected to the main body 109 to prevent the reset member 108 and the inner core 103 from completely detaching from the outer cylinder 102. When the outer cylinder 102 includes the main body 109 and the end cap 110, both the main body 109 and the end cap 110 can be made of iron. The top surface of the end cap 110 can serve as the connecting surface 113, the bottom surface of the end cap 110 can serve as the first end surface 105, and the top surface of the main body 109 can serve as the second end surface 114.
[0046] The end cap 110 and the main body 109 can be fixed by a threaded connection. For example, the end cap 110 is provided with an external thread, and the bottom of the inner wall surface of the main body 109 is provided with an internal thread (neither the external thread nor the internal thread is shown). In other embodiments, the end cap 110 and the main body 109 can also be fixed by magnetic connection, snap-fit, screw connection, etc.
[0047] like Figure 4 As shown, when the inner core 103 is in the extended position, the distance between the first end face 105 and the third end face 104 along the axial direction of the inner core 103 is L2. In some embodiments, L2 satisfies: 6mm ≤ L2 ≤ 20mm. Since L2 is not less than 6mm, when the inner core 103 is in the extended position, the distance between the horn magnet, which is pressed against by the third end face 104, and the first end face 105 is relatively large. This can effectively reduce the attractive force between the first end face 105 and the horn magnet, making it easier to release the mutual attraction between the horn magnet and the first end face 105. L2 being no greater than 20mm helps prevent the inner core 103 from having an excessively long stroke. In this way, the range of motion of the user's fingers does not need to be too large, which helps to improve the ease of use of the magnet transfer fixture 101 and reduce the fatigue of the user after using the magnet transfer fixture 101 for a long time.
[0048] like Figure 1 As shown, the outer cylinder 102 is cylindrical, and its outer diameter is D. In some embodiments, D satisfies: 8mm ≤ D ≤ 20mm. When the outer diameter of the outer cylinder 102 meets the above conditions, the outer cylinder 102 is suitable for a user to hold with one hand. This helps improve the comfort of using the magnet transfer fixture 101 and reduces hand fatigue or discomfort for the user.
[0049] like Figure 1As shown, the length of the outer cylinder 102 in the axial direction of the inner core 103 is L1. In some embodiments, L1 satisfies: 100mm≤L1≤150mm. In the case that the axial length of the outer cylinder 102 satisfies the above condition, the length and weight of the outer cylinder 102 are moderate, and the outer cylinder 102 is suitable to be held by a user with one hand. This is conducive to improving the use comfort of the magnet transfer jig 101 and reducing the fatigue or discomfort of the user's hand.
[0050] In the description of the present utility model, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
Claims
1. A magnet transfer fixture, characterized in that, include: The outer cylinder has an outer surface including a first end face and a second end face that are opposite to each other, and the first end face is able to attract a magnet. The inner core is fitted around the outer periphery of the outer cylinder. The inner core includes a third end face and a fourth end face that are opposite to each other. The third end face does not attract the magnet. The inner core can move relative to the outer cylinder to switch between a retracted position and an extended position. An elastic layer is connected to and covers the fourth end face. When the elastic layer is pressed, the inner core can move from the retracted position to the extended position. When the inner core is in the retracted position, a portion of the inner core extends from the second end face to the outside of the outer cylinder, the fourth end face and the elastic layer are located outside the outer cylinder, the fourth end face is spaced apart from the second end face, and the third end face is located inside the outer cylinder or is flush with the first end face; When the inner core is in the extended position, a portion of the inner core extends from the first end face to the outside of the outer cylinder, and the third end face is located outside the outer cylinder. In the axial direction of the inner core, the third end face is spaced apart from the first end face.
2. The magnet transfer fixture according to claim 1, characterized in that, The elastic layer includes a covering portion and a peripheral portion. The covering portion covers the fourth end face, and the peripheral portion is connected to the outer periphery of the covering portion and surrounds the covering portion. The peripheral portion is sleeved on the outer periphery of the inner core.
3. The magnet transfer fixture according to claim 1, characterized in that, The magnet transfer fixture also includes a reset member, which is elastic. The outer cylinder and the inner core are both connected to the reset member. When the pressing of the elastic layer is released, the elastic force of the reset member can drive the inner core from the extended position to the retracted position. Furthermore, the elastic force of the reset member is also used to keep the inner core in the retracted position.
4. The magnet transfer fixture according to claim 3, characterized in that, The inner core includes a first shoulder and a second shoulder facing each other, and the inner wall surface of the outer cylinder includes a connecting surface and a limiting surface, the connecting surface and the limiting surface being located at both ends of the outer cylinder respectively; The reset member is located inside the outer cylinder and at the end of the outer cylinder away from the second end face. The reset member is sleeved on the outer periphery of the inner core. The two ends of the reset member abut against the first shoulder and the connecting surface, respectively. When the inner core is in the retracted position, the elasticity of the reset member keeps the second shoulder abutting against the limiting surface.
5. The magnet transfer fixture according to claim 3, characterized in that, The outer cylinder includes a main body and an end cap. The end cap is detachably connected to the main body. The reset member is located inside the outer cylinder, and its two ends are respectively connected to the inner core and the end cap.
6. The magnet transfer fixture according to claim 1, characterized in that, The outer cylinder is cylindrical, and the outer diameter of the outer cylinder is D, where 8mm≤D≤20mm; And / or, the length of the outer cylinder in the axial direction of the inner core is L1, 100mm≤L1≤150mm.
7. The magnet transfer fixture according to claim 1, characterized in that, When the inner core is in the extended position, the distance between the first end face and the third end face in the axial direction of the inner core is L2, where 6mm ≤ L2 ≤ 20mm.
8. The magnet transfer fixture according to claim 1, characterized in that, The first end face is an annular plane, and the third end face is a circular plane; And / or, the second end face is an annular plane, the fourth end face is a circular plane, and the portion of the elastic layer covering the fourth end face is planar.
9. The magnet transfer fixture according to any one of claims 1 to 8, characterized in that, The outer cylinder is made of iron; And / or, the material of the inner core is one of zinc, aluminum, and copper; And / or, the elastic layer is made of polyurethane.
10. A magnet transfer fixture, characterized in that, include: The outer cylinder has an outer surface including a first end face and a second end face that are opposite to each other, and the first end face is able to attract a magnet. The inner core is made of an elastic material, and the outer cylinder is sleeved on the outer periphery of the inner core. The inner core includes a third end face and a fourth end face that are opposite to each other. The third end face does not attract each other with a magnet. The inner core can move relative to the outer cylinder to switch between a retracted position and an extended position. When the fourth end face is pressed, the inner core can move from the retracted position to the extended position. When the inner core is in the retracted position, a portion of the inner core extends from the second end face to the outside of the outer cylinder, the fourth end face is located outside the outer cylinder, the fourth end face is spaced apart from the second end face, and the third end face is located inside the outer cylinder or is flush with the first end face; When the inner core is in the extended position, a portion of the inner core extends from the first end face to the outside of the outer cylinder, and the third end face is located outside the outer cylinder. In the axial direction of the inner core, the third end face is spaced apart from the first end face.