A miniature iron core linear motor

Abstract

The present invention relates to the technical field of linear motors, specifically a miniature linear motor with an iron core, including a base and a permanent magnet installed on its top surface, an iron core winding is arranged above the permanent magnet, the iron core winding includes a winding seat, a plurality of winding groups wound inside the winding seat, and a shell covering the outside of the winding seat; a wire outlet portion for leading out a plurality of winding group terminal cables and preventing them from being pulled off during bending is arranged at the rear of the top surface of the shell. The present invention is provided with a wire outlet portion for leading out a plurality of winding group terminal cables and preventing them from being pulled off during bending on the shell, and it adopts a unique upper wire outlet design to prevent the total length from increasing due to cable bending, that is, the length of the reserved cable is eliminated by positioning the cable terminal; the wire outlet portion is used to have the ability to swing elastically to avoid pulling off the cable terminal during movement, so that when the motor is working as a whole, the cable can be twisted and swung with the lateral swing of the winding group without being disconnected.

Description

Technical Field

[0001] The invention relates to the technical field of linear motors, and in particular to a miniature iron-core linear motor. Background Art

[0002] A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating motor cut radially and unfolded into a plane. After the stator winding is connected to three-phase alternating current, the energized coil will generate a magnetic field according to the magnetic effect of the current. This magnetic field and the magnetic field generated by the permanent magnet of the mover will combine to form a sinusoidal magnetic field moving along a straight line, that is, a traveling wave magnetic field. The moving direction of this magnetic field is determined by the phase sequence of the three-phase alternating current.

[0003] At present, the demand for single-axis multi-motor linear motor modules in domestic equipment is increasing. By designing high-thrust and smaller iron-core linear motors, the number of heads of the original equipment can be increased several times while maintaining the click thrust, which means that the efficiency of the equipment will increase exponentially and there will be a broad market; however, the wiring cable of the coil of the linear motor will get rid of it as the motor reciprocates, resulting in insensitive wiring terminals. Summary of the invention

[0004] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a miniature iron-core linear motor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a miniature iron-core linear motor, including a base and a permanent magnet installed on its top surface, an iron core winding is arranged above the permanent magnet, the iron core winding includes a winding seat, a plurality of winding groups wound inside the winding seat and a shell covering the outside of the winding seat, the winding seat is a rectangular frame structure with front and rear ends opened and its bottom surface open, a plurality of winding ends are arranged at equal intervals on the inner top surface of the winding seat, and the winding groups are wound and connected with the winding ends; a wire outlet portion is arranged at the rear of the top surface of the shell for leading out a plurality of winding group terminal cables and preventing them from being pulled off during bending.

[0006] As a further improvement of the technical solution, the wire outlet portion is an elastic wire outlet barrel, and a sleeve connected to the interior of the shell is provided on the top surface and near the rear of the shell, and the bottom end of the wire outlet barrel is sleeve-fitted with the sleeve. The wire outlet barrel is made of PP material in a cylindrical shape, and a circular arc flange is provided on the top.

[0007] As a further improvement of the present technical solution, the wire outlet portion is a wire outlet sleeve, which includes a wire tube, a twisting sleeve arranged under the wire tube, and a wire clamping ring. The twisting sleeve is made of deformable and restorable material to form a cylindrical shape, and the wire clamping ring is tightly fitted inside the sleeve.

[0008] As a further improvement of the technical solution, the twisting sleeve is made of silicone material or rubber material and is in a cylindrical shape, and the inner wall thereof is protruding with a limit platform, and the limit platform is equal to the inner diameter of the wire tube and the sleeve.

[0009] As a further improvement of the technical solution, the inner wall of the wire clamping ring is provided with a plurality of clips at equal intervals in a ring shape, and the plurality of clips form a funnel shape through which the terminal cable can pass.

[0010] As a further improvement of the present technical solution, the wire outlet part is a wire outlet bag, which includes a wire clamping sleeve, a wire storage bag in a hollow spherical shape, and a wire pad which is sleeved inside the wire clamping sleeve and can move up and down; the wire clamping sleeve is in the shape of a cylinder with an open upper end and the inner diameter of the upper end is smaller than the inner diameter of the lower end, and the wire pad is made of a deformable and restorable material in a circular ring shape, and the outer diameter of the wire pad is at least equal to the inner diameter of the lower end of the wire clamping sleeve.

[0011] As a further improvement of the technical solution, a wire hole is opened in the center of the bottom end of the wire clamping sleeve, the wire sleeve pad is made of silicone and has annular grooves on its upper and lower surfaces, and the center hole of the wire sleeve pad is tightly fitted with the terminal cable.

[0012] As a further improvement of the present technical solution, the wire storage bag is made of silicone and has a threading end at its lower end which is tightly fitted with the inner wall of the sleeve, and a mouthpiece at its upper end which is tightly fitted with the outer wall of the wire clamping sleeve. The side wall of the mouthpiece is provided with a valve mouth connected to the interior of the wire storage bag, and the center hole of the threading end is tightly fitted with the wiring terminal cable.

[0013] As a further improvement of the present technical solution, the wire outlet part is a wire outlet ring group, which includes an upper wire ring and a lower wire ring arranged at an upper and lower interval, a plurality of connecting rods connected between the upper wire ring and the lower wire ring, and a tension spring sleeved between the lower wire ring and the bottom end of the connecting rod; the connecting rod is made of a deformable and restorable material to form a thin rod shape.

[0014] As a further improvement of the present technical solution, the inner wall of the upper wire ring is provided with pressure plates in a circular shape at equal intervals, and a plurality of pressure plates form a funnel shape that can pass through the wiring terminal cable. The connecting rod is made of PP material or steel wire, and the lower wire ring is tightly fitted with the sleeve. The upper end of the connecting rod is tightly plugged into the end face of the upper wire ring, and the lower end is movably plugged into the end face of the lower wire ring, and the bottom end of the connecting rod extends to the bottom of the lower wire ring. The bottom end of the connecting rod is provided with a cone with an outer diameter larger than the outer diameter of the tension spring, and the upper and lower ends of the tension spring are both bonded and fixed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The miniature iron core linear motor is provided with a wire outlet portion on the shell for leading out a plurality of cables of the winding group terminals and preventing them from being pulled off during bending. The unique upper wire outlet design is adopted to prevent the total length from increasing due to the bending of the cables, that is, the length of the reserved cables is eliminated by positioning the cable terminals; the wire outlet portion has the ability to swing elastically to prevent the cable terminals from being pulled off during movement, so that when the motor is working as a whole, the cables will not be disconnected when twisted and swung along with the lateral swing of the winding group.

[0017] 2. The miniature iron core linear motor has an outlet portion that is an elastic outlet barrel, and utilizes the outlet barrel with elastic swinging ability to prevent the cable terminal from being torn off during movement, so that when the motor is working as a whole, the cable will not be disconnected due to the lateral swing of the winding group.

[0018] 3. The miniature iron core linear motor has a wire outlet sleeve, and utilizes a torsion sleeve and a conductor barrel with elastic swinging ability to prevent the cable terminal from being torn off when the cable terminal moves, so that when the motor is working as a whole, the cable will not be disconnected when it twists and swings with the lateral swing of the winding group.

[0019] 4. The miniature iron core linear motor has a wire outlet portion which is a wire outlet bag. The wire outlet bag includes a wire storage bag that can store cables. The wire storage bag and the wire clamp sleeve with elastic swinging ability are used as a whole to prevent the cable terminal from being torn off when moving, so that when the motor is working as a whole, the cable will not be disconnected due to the lateral swing of the winding group.

[0020] 5. The miniature iron core linear motor has an outlet ring group as the outlet part, and uses a connecting rod with elastic swinging ability to prevent the cable terminal from being torn off during movement, so that when the motor is working as a whole, the cable will not be disconnected due to the lateral swing of the winding group. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0022] Figure 1 This is one of the schematic diagrams of the overall assembly structure of the present invention;

[0023] Figure 2 It is a partial split diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the shell structure of the present invention;

[0025] Figure 4This is the second schematic diagram of the overall assembly structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the outlet set of the present invention;

[0027] Figure 6 It is a full cutaway assembly diagram of the twisting sleeve of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the twisting sleeve of the present invention;

[0029] Figure 8 This is the third schematic diagram of the overall assembly structure of the present invention;

[0030] Fig. 9 This is a schematic diagram of the assembly structure of the wire outlet bag of the present invention;

[0031] Fig.10 This is a full cutaway assembly diagram of the outlet bag of the present invention;

[0032] Fig.11 It is a full cross-sectional view of the outlet bag of the present invention;

[0033] Fig.12 It is a full cross-sectional view of the wire clamping sleeve of the present invention;

[0034] Fig.13 It is a schematic diagram of the structure of the wire sleeve pad of the present invention;

[0035] Fig.14 This is the fourth schematic diagram of the overall assembly structure of the present invention;

[0036] Fig.15 It is a schematic diagram of the assembly structure of the outlet ring assembly of the present invention;

[0037] Fig.16 This is a disassembled diagram of the outlet ring assembly of the present invention.

[0038] The meaning of each number in the figure is:

[0039] 100. base; 110. permanent magnet;

[0040] 200, iron core winding; 210, winding seat; 211, winding end; 220, winding group; 230, housing; 231, bayonet; 232, sleeve;

[0041] 300, outlet barrel;

[0042] 400, outlet sleeve; 410, conductor barrel; 420, twisting sleeve; 421, limit table; 430, clamping ring; 431, clamping piece;

[0043] 500, line outlet bag; 510, line clamp; 511, line hole; 520, line storage bag; 521, threading end; 522, nozzle; 523, valve; 530, line pad; 531, groove;

[0044] 600, outlet ring assembly; 610, upper wire ring; 611, pressing piece; 620, connecting rod; 630, lower wire ring; 640, tension spring. DETAILED DESCRIPTION

[0045] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0046] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined. Example

[0047] See also Figure 1-Figure 3 As shown, the present invention provides a miniature iron core linear motor, including a base 100 and a permanent magnet 110 mounted on its top surface, an iron core winding 200 is arranged above the permanent magnet 110, and the iron core winding 200 includes a winding seat 210, a plurality of winding groups 220 wound inside the winding seat 210, and a shell 230 covered outside the winding seat 210, the winding seat 210 is a rectangular parallelepiped frame structure with front and rear ends opened and its bottom surface opened, and a plurality of winding ends 211 are arranged at equal intervals on the inner top surface of the winding seat 210;

[0048] The winding seat 210 is made of silicon steel sheet and has an integrated design. A threaded hole is provided on the top boss. The top surface of the shell 230 is provided with a bayonet 231 that is engaged with the boss and is fixed by bolts, thereby reducing the overall height of the motor and enhancing the rigidity of the motor. The winding group 220 is wound and connected with the winding end 211, and a distributed winding is adopted to enhance the heat dissipation capacity of the motor. It is measured by experiments that the motor size is 55*28.5*24mm, which is the smallest linear motor in China at present. The rated thrust is up to 19N, and the instantaneous thrust is up to 61N. The maximum speed can reach 10m / s.

[0049] Specifically, a wire outlet portion for leading out the wires of the terminal of the winding group 220 and preventing them from being pulled out during bending is provided at the rear of the top surface of the housing 230. The unique upper wire outlet design is adopted to prevent the total length from increasing due to the bending of the cables, that is, the length of the reserved cables is eliminated by positioning the cable terminals.

[0050] The wire outlet portion is an elastic wire outlet reel 300, and a sleeve 232 connected to the interior of the shell 230 is provided on the top surface and near the rear of the shell 230. The bottom end of the wire outlet reel 300 is sleeved with the sleeve 232. The wire outlet reel 300 is made of PP material and is in a cylindrical shape, and a circular arc flange is provided on the top. Since the power terminal of the cable is stationary, the winding group 220 drives the cable terminal to move when it moves on the permanent magnet 110, and the circular arc flange ensures that the middle section of the cable is not worn when it is twisted; the wire outlet reel 300 with elastic swinging ability prevents the cable terminal from being pulled off when it moves, so that when the motor is working as a whole, the cable will not be disconnected when it is twisted with the lateral swing of the winding group 220. Example

[0051] See also Figure 1-Figure 7 As shown, a wire outlet portion for leading out a plurality of wires of the winding assembly 220 and preventing them from being pulled out during bending is provided at the rear of the top surface of the housing 230. The unique upper wire outlet design is adopted to prevent the total length from increasing due to the bending of the cables, that is, the reserved length of the cables is eliminated by positioning the cable terminals.

[0052] The outlet portion is an outlet sleeve 400, which includes a wire barrel 410, a twist sleeve 420 sleeved under the wire barrel 410, and a wire clamping ring 430. The twist sleeve 420 is made of a deformable and restorable material to form a cylindrical shape. The wire barrel 410 can be twisted freely by utilizing the flexibility of the twist sleeve 420. The wire clamping ring 430 is tightly sleeved inside the sleeve 232, and the wire clamping ring 430 is used to locate the cable terminal.

[0053] The twisting sleeve 420 is made of silicone or rubber material and is cylindrical, and the inner wall thereof is protruding with a limit platform 421. The limit platform 421 has the same inner diameter as the wire tube 410 and the sleeve 232, so that the twisting sleeve 420 is positioned between the wire tube 410 and the sleeve 232, thereby forming a deformable bending section.

[0054] The inner wall of the wire clamping ring 430 is provided with a plurality of clips 431 at equal intervals in a circular shape, and the plurality of clips 431 form a funnel shape through which the cables at the terminal can pass; the wire clamping ring 430 and the plurality of clips 431 are made of PP material or spring steel material to form an integral structure, so that the plurality of clips 431 have elasticity, and when clamping the cable, the cable can be turned up and tightened at the moment the cable is lifted up, so that the cable terminal is not affected by the pulling force.

[0055] When the miniature iron core linear motor of the present invention is working, since the power terminal of the cable is stationary, when the winding group 220 moves on the permanent magnet 110, it drives the cable terminal to move. The arc flange provided at the top end of the wire tube 410 ensures that the middle section of the cable is not worn when it is twisted; the torsion sleeve 420 and the wire tube 410 with elastic swinging ability as a whole can prevent the cable terminal from being pulled off when it moves, so that when the motor is working as a whole, the cable will twist and swing with the lateral swing of the winding group 220 without being disconnected. Example

[0056] See also Figure 8-Figure 13 As shown, a wire outlet portion for leading out a plurality of wires of the winding assembly 220 and preventing them from being pulled out during bending is provided at the rear of the top surface of the housing 230. The unique upper wire outlet design is adopted to prevent the total length from increasing due to the bending of the cables, that is, the reserved length of the cables is eliminated by positioning the cable terminals.

[0057] The wire outlet portion is a wire outlet bag 500, which includes a wire clamping sleeve 510, a wire storage bag 520 in the form of a hollow sphere, and a wire pad 530 that is sleeved inside the wire clamping sleeve 510 and can move up and down; a section of wire can be stored inside the wire storage bag 520 to ensure that the cable can be stretched and retracted freely when twisting and swinging, so as to avoid affecting the tightness of its terminal; the wire clamping sleeve 510 is in the shape of a cylinder with an opening at the upper end, and the inner diameter of the upper end is smaller than the inner diameter of the lower end; the wire pad 530 is made of a deformable and restorable material and is made into a circular ring shape, and the outer diameter of the wire pad 530 is at least equal to the inner diameter of the lower end of the wire clamping sleeve 510; therefore, when the wire pad 530 is pulled up by the cable, it will be squeezed by the wire clamping sleeve 510 to limit the elongation of the cable, that is, it protects the cable terminal from being pulled;

[0058] A wire hole 511 is provided at the center of the bottom end of the wire clamping sleeve 510, and the wire pad 530 is made of silicone and has annular grooves 531 on its upper and lower surfaces, so that the wire pad 530 can shrink in volume when under pressure; the center hole of the wire pad 530 is tightly fitted with the terminal cable, so that the wire outlet above the wire storage bag 520 remains sealed, and then the upward movement of the wire pad 530 will draw out the air in the wire storage bag 520, causing it to shrink and form an elastic section, which is convenient for the torsion and swinging movement of the cable.

[0059] Furthermore, the wire storage bag 520 is made of silicone and has a threading end 521 at its lower end which is tightly fitted with the inner wall of the sleeve 232, and a nozzle 522 at its upper end which is tightly fitted with the outer wall of the wire clamping sleeve 510, and a valve nozzle 523 is provided on the side wall of the nozzle 522 which is connected with the inside of the wire storage bag 520 for replenishing gas to expand the wire storage bag 520 and store wire; the center hole of the threading end 521 is tightly fitted with the terminal cable, so that the wire entry point below the wire storage bag 520 remains in a sealed state, and then when the wire pad 530 moves upward, the air in the wire storage bag 520 is sucked out due to the negative pressure, forming a deflated state, that is, forming an elastic section, which is convenient for the torsion and swinging movement of the cable.

[0060] When the miniature iron core linear motor of the present invention is working, since the power terminal of the cable is stationary, when the winding group 220 moves on the permanent magnet 110, it drives the cable terminal to move. The arc flange provided at the top end of the wire clamping sleeve 510 ensures that the middle section of the cable is not worn when it is twisted. The wire storage bag 520 and the wire clamping sleeve 510 with elastic swinging ability as a whole can prevent the cable terminal from being pulled off when it moves, so that when the motor is working as a whole, the cable will not be disconnected when it twists and swings with the lateral swing of the winding group 220. Example

[0061] See also Figure 14-16 As shown, a wire outlet portion for leading out a plurality of wires of the winding assembly 220 and preventing them from being pulled out during bending is provided at the rear of the top surface of the housing 230. The unique upper wire outlet design is adopted to prevent the total length from increasing due to the bending of the cables, that is, the reserved length of the cables is eliminated by positioning the cable terminals.

[0062] The lead-out portion is a lead-out ring assembly 600, which includes an upper lead-out ring 610 and a lower lead-out ring 630 spaced apart in an upper and lower direction, a plurality of connecting rods 620 connected between the upper lead-out ring 610 and the lower lead-out ring 630, and a tension spring 640 sleeved between the lower lead-out ring 630 and the bottom end of the connecting rod; the connecting rod 620 is made of a deformable and restorable material to form a thin rod shape, and utilizes its own elastic deformation to cooperate with the upper lead-out ring 610 and the lower lead-out ring 630 to support the lead-out wire on the cable.

[0063] Specifically, the inner wall of the upper wire ring 610 is provided with pressing plates 611 in a circular shape at equal intervals, and a plurality of pressing plates 611 form a funnel shape through which the terminal cable can pass. The upper wire ring 610 and the plurality of pressing plates 611 are made of PP material or spring steel material to form an integral structure, so that the plurality of clamping plates 431 have elasticity, and when clamping the cable, the cable can be flipped up and tightened at the moment the cable is lifted up, so that the cable terminal is not affected by the pulling force.

[0064] Furthermore, the connecting rod 620 is made of PP material or steel wire, so that the connecting rod 620 is flexible and can be bent and restored; the lower wire ring 630 is tightly sleeved with the sleeve 232, the upper end of the connecting rod 620 is tightly plugged with the end face of the upper wire ring 610, and the lower end is movably plugged with the end face of the lower wire ring 630, and the bottom end of the connecting rod 620 extends to the bottom of the lower wire ring 630, and the bottom end of the connecting rod 620 is provided with a truncated cone with an outer diameter greater than the outer diameter of the tension spring 640, and the upper and lower ends of the tension spring 640 are both bonded and fixed, that is, respectively bonded to the bottom surface of the lower wire ring 630 and the top surface of the truncated cone;

[0065] Therefore, when the motor is not moving, the tension spring 640 is used to suspend the upper wire ring 610 to support the cable. When the motor moves, the torsion and swing of several connecting rods 620 drive some tension springs 640 to bend and compress, and some tension springs 640 to bend and stretch. That is, the tension spring 640 can suspend the upper wire ring 610 without interfering with the torsion and swing movement of the connecting rod 620, so that the cable can twist and swing freely with the movement of the winding group 220 without getting off the line.

[0066] When the miniature iron core linear motor of the present invention is working, since the power terminal of the cable is stationary, when the winding group 220 moves on the permanent magnet 110, it drives the cable terminal to move. The connecting rod 620 with elastic swinging ability prevents the cable terminal from being torn off when moving, so that when the motor is working as a whole, the cable can twist and swing with the lateral swing of the winding group 220 without being disconnected.

[0067] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A miniature iron core linear motor, comprising a base (100) and a permanent magnet (110) mounted on the top surface thereof, wherein an iron core winding (200) is arranged above the permanent magnet (110), characterized in that: The iron core winding (200) comprises a winding seat (210), a plurality of winding groups (220) wound inside the winding seat (210), and a shell (230) covered outside the winding seat (210); the winding seat (210) is a rectangular parallelepiped frame structure with front and rear ends opened and an open bottom surface; a plurality of winding ends (211) are arranged at equal intervals on the internal top surface of the winding seat (210); the winding groups (220) are wound and connected to the winding ends (211); and a wire outlet portion for leading out the wiring end cables of the plurality of winding groups (220) and preventing them from being pulled off when bent is arranged at the rear of the top surface of the shell (230); The wire outlet portion is a wire outlet bag (500), and the wire outlet bag (500) comprises a wire clamping sleeve (510), a wire storage bag (520) in the form of a hollow sphere, and a wire sleeve pad (530) sleeved inside the wire clamping sleeve (510) and movable up and down; the wire clamping sleeve (510) is in the form of a cylinder with an open upper end, and the inner diameter of the upper end is smaller than the inner diameter of the lower end; the wire sleeve pad (530) is made of a deformable and restorable material and is made into a circular ring shape; the outer diameter of the wire sleeve pad (530) is at least equal to the inner diameter of the lower end of the wire clamping sleeve (510); or, The outlet portion is an outlet ring assembly (600), the outlet ring assembly (600) comprising an upper wire ring (610) and a lower wire ring (630) arranged at an interval, a plurality of connecting rods (620) connected between the upper wire ring (610) and the lower wire ring (630), and a tension spring (640) sleeved between the lower wire ring (630) and the bottom end of the connecting rod; the connecting rod (620) is made of a deformable and restorable material and is made into a thin rod shape; The inner wall of the upper wire ring (610) is provided with pressing plates (611) in an annular shape at equal intervals, and a plurality of pressing plates (611) form a funnel shape through which the wire of the terminal can pass. The connecting rod (620) is made of PP material or steel wire. The lower wire ring (630) is tightly sleeved with the sleeve (232). The upper end of the connecting rod (620) is tightly plugged with the end face of the upper wire ring (610), and the lower end is movably plugged with the end face of the lower wire ring (630). The bottom end of the connecting rod (620) is provided with a truncated cone with an outer diameter greater than the outer diameter of the tension spring (640), and the upper and lower ends of the tension spring (640) are both bonded and fixed.

2. The miniature iron core linear motor according to claim 1, characterized in that: A wire hole (511) is provided at the center of the bottom end of the wire clamping sleeve (510); the wire sleeve pad (530) is made of silicone and has an annular groove (531) provided on its upper and lower surfaces; the center hole of the wire sleeve pad (530) is tightly sleeved with the terminal cable.

3. The miniature iron core linear motor according to claim 2, characterized in that: The wire storage bag (520) is made of silicone and has a threading end (521) at its lower end that is tightly sleeved with the inner wall of the sleeve (232), and a mouthpiece (522) at its upper end that is tightly sleeved with the outer wall of the wire clamping sleeve (510). The side wall of the mouthpiece (522) is provided with a valve (523) that is connected to the inside of the wire storage bag (520), and the center hole of the threading end (521) is tightly sleeved with the wiring terminal cable.

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