A locking and fixing structure for a stepper motor in a quartz watch movement

Abstract

This invention discloses a locking and fixing structure for a stepper motor in a quartz watch movement, comprising a main plate and a stepper motor. The stepper motor includes a coil core with a coil wound around it and stator plates. Both the coil core and stator plates have positioning holes, into which sleeves are inserted. The coil core and stator plates are fitted onto a positioning rod via the sleeves. The lower ends of the positioning holes on the stator plates expand outwards to form a first positioning groove with an annular structure. Positioning rings are installed on the sleeves at the locations corresponding to the second positioning grooves. Locking rings are installed on the upper ends of the positioning rods. This invention has a simple structure. The positioning rings and positioning parts allow the stator plates and coil core to be tightly fitted together, and the locking rings fix the tightly fitted stepper motor to the main plate, preventing loosening between the stator plates and coil core. This ensures that the stator plates and coil core are always locked together, improving the movement's yield rate and reliability.

Description

Technical Field

[0001] This invention relates to the field of quartz watch technology, specifically to a locking and fixing structure for a stepper motor in a quartz watch movement. Background Technology

[0002] Currently, most mass-produced quartz watch movements use PC plastic sleeves for locking. However, mass production and market feedback indicate that this technology has a significant problem: because the sleeve is always tightly fitted, there is high tensile stress, which can cause the plastic sleeve to crack and loosen. This can lead to the stepper motor stator plates becoming detached from the coil core, reducing output torque, degrading motor performance, and causing the movement to stop and the watch to slow down. Furthermore, this problem occurs intermittently, potentially from production to assembly of the finished watch, and has become a major hidden danger affecting the quality of the movement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a locking and fixing structure for the stepper motor of a quartz watch movement, which can first press the stator plate and the coil core together, and then press them together on the main clamping plate to ensure that the two are tightly fitted.

[0004] This invention is achieved through the following technical solution: a locking and fixing structure for a stepper motor in a quartz watch movement, comprising a main plate and a stepper motor. The stepper motor includes a coil core with a coil wound around it and stator plates. Multiple positioning rods are mounted on the main plate. Positioning holes are provided on both the coil core and the stator plates, and sleeves are inserted into these holes. The coil core and stator plates are fitted onto the positioning rods through the sleeves. The lower ends of the positioning holes on the stator plates expand outwards to form a first positioning groove with an annular structure. The upper end of each positioning hole expands outward to form a second positioning groove with an annular structure. The sleeve, facing the first positioning groove, expands outward to form a positioning part with an annular structure. The positioning part is inserted into the first positioning groove. The sleeve, facing the second positioning groove, is equipped with a positioning ring. The lower end of the positioning ring is inserted into the second positioning groove. The upper end of each positioning rod is equipped with a locking ring. The lower end of the locking ring expands outward to form a stepped pressing part. The lower end of the pressing part bends outward to form a flange with an annular structure. The bottom surface of the flange abuts against the top surface of the coil core.

[0005] As a preferred technical solution, the positioning rod is provided with slots above and below the locking ring, and a positioning pin is inserted into each slot. One end of each positioning pin extends to the outside, and the other end is equipped with a spring. The end of the spring away from the positioning pin is installed on the inner wall of the slot. The top surface of the locking ring abuts against the upper positioning pin, and the bottom surface of the locking ring abuts against the lower positioning pin.

[0006] As a preferred technical solution, the inner ring surface of the positioning ring is provided with a first external thread, and the outer ring surface of the sleeve is provided with a first internal thread at the position corresponding to the first external thread. The positioning ring is connected to the first internal thread on the sleeve through the first external thread.

[0007] As a preferred technical solution, the inner ring surface of the locking ring is provided with a second external thread, and the outer ring surface of the positioning rod is provided with a second internal thread at the position corresponding to the second external thread. The locking ring is connected to the positioning rod by the second external thread through engagement with the second internal thread.

[0008] As a preferred technical solution, the bottom surface of the clamping part abuts against the top surface of the positioning ring.

[0009] As a preferred technical solution, the thickness of the positioning ring is greater than the depth of the second positioning groove, the upper end of the positioning ring protrudes from the coil core, and multiple insertion holes are provided on the top surface of the positioning ring.

[0010] As a preferred technical solution, both the slot and the positioning post have rectangular cross-sections.

[0011] The beneficial effects of this invention are as follows: This invention has a simple structure. The positioning ring and positioning part can first tightly fit the stator laminations and the coil core, so that the stepper motor can be assembled in a stable state. The locking ring can fix the tightly fitted stepper motor to the main clamping plate. The positioning pin can position the locking ring up and down, preventing the locking ring from loosening. Since the pressing part at the lower end of the locking ring abuts against the positioning ring, it can position the positioning ring, preventing loosening between the stator laminations and the coil core. It can always lock the stator laminations and the coil core, preventing loosening and improving the quality and reliability of the mechanism. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0017] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0018] like Figure 1 and Figure 2 As shown, the present invention discloses a stepper motor locking and fixing structure for a quartz watch movement, comprising a main plate 1 and a stepper motor. The stepper motor includes a coil core 3 with a coil 4 wound around it and a stator plate 2. Multiple positioning rods 5 are mounted on the main plate 1. Positioning holes are provided on both the coil core 3 and the stator plate 2, and sleeves 14 are inserted into these holes. Both the coil core 3 and the stator plate 2 are fitted onto the positioning rods 5 through the sleeves. The lower ends of the positioning holes on the stator plate 2 expand outwards to form a first positioning groove with an annular structure. The upper ends of the positioning holes on the coil core 3 expand outwards. The second positioning groove is enlarged to form a ring structure. The sleeve 14 is enlarged outward to form a ring structure positioning part 6 at the position opposite to the first positioning groove. The positioning part 6 is inserted into the first positioning groove. The sleeve 14 is installed with a positioning ring 7 at the position opposite to the second positioning groove. The lower end of the positioning ring 7 is inserted into the second positioning groove. The upper end of the positioning rod 5 is installed with a locking ring 11. The lower end of the locking ring 11 is enlarged outward to form a stepped pressing part 9. The lower end of the pressing part 9 is bent outward to form a flange 12 with a ring structure. The bottom surface of the flange 12 abuts against the top surface of the coil core 3.

[0019] In this embodiment, the positioning rod 5 is provided with slots above and below the locking ring, and a positioning post 8 is inserted into each slot. One end of the positioning post 8 extends to the outside, and the other end is equipped with a spring 13. The end of the spring 13 away from the positioning post is installed on the inner wall of the slot. The top surface of the locking ring 11 abuts against the upper positioning post 8, and the bottom surface of the locking ring 11 abuts against the lower positioning post 8.

[0020] In this embodiment, the inner ring surface of the positioning ring 7 is provided with a first external thread, and the outer ring surface of the sleeve 14 is provided with a first internal thread at the position opposite to the first external thread. The positioning ring 7 is connected to the first internal thread on the sleeve through the first external thread, and the threaded connection facilitates disassembly and installation.

[0021] In this embodiment, the inner ring surface of the locking ring 11 is provided with a second external thread, and the outer ring surface of the positioning rod 5 is provided with a second internal thread at the position opposite to the second external thread. The locking ring 11 is connected to the positioning rod 5 by the second external thread and the second internal thread, which facilitates disassembly and installation.

[0022] In this embodiment, the bottom surface of the pressing part 9 abuts against the top surface of the positioning ring 7. The pressing part can press and position the positioning ring, avoiding the loosening between the stator lamination and the coil core caused by the upward movement of the positioning ring.

[0023] In this embodiment, the thickness of the positioning ring 7 is greater than the depth of the second positioning groove. The upper end of the positioning ring 7 protrudes from the coil core. The top surface of the positioning ring 7 is provided with multiple insertion holes. A small screwdriver can be inserted into the insertion holes and the positioning ring can be rotated to move the positioning ring downward along the thread until the coil core and stator lamination are pressed together. Conversely, after the positioning ring is rotated upward, the positioning ring can be removed from the sleeve, so that the coil core and stator lamination can be disassembled.

[0024] In this embodiment, both the slot and the positioning post 8 have rectangular cross-sections, which prevents the positioning post from rotating and allows it to move back and forth horizontally along the slot.

[0025] During installation, first put the coil core and stator laminations onto the sleeve. The positioning part on the sleeve can be inserted into the first positioning groove to position the lower part of the stator laminations. After that, the positioning ring can be put on and rotated downward along the thread. After the positioning ring enters the second positioning groove, the coil core and stator laminations can be pressed down to press and position them.

[0026] After the above steps are completed, the stepper motor is sleeved onto the positioning rod and presses the upper positioning post inward, causing the upper positioning post to retract into the slot. At this time, the locking ring is rotated, causing the locking ring to move downward through the upper positioning post. After moving to a certain extent, the upper positioning post will pop out due to the spring rebound. The upper and lower positioning posts can position the locking ring vertically, preventing the locking ring from loosening. When the locking ring is in this position, the flange on the locking ring will abut against the top surface of the coil core, further pressing the stepper motor. The pressing part will abut against the positioning ring. Since the locking ring cannot move, it can limit the positioning ring and prevent the positioning ring from rotating, ensuring the overall firmness.

[0027] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A quartz watch movement stepping motor locking and fixing structure, characterized in that: The utility model relates to a main clamping plate (1) and step motor, the main clamping plate (1) is installed with a plurality of positioning rods (5), the coil core (3) and stator sheet (2) are equipped with positioning hole, positioning hole all inserts the bushing, coil core (3) and stator sheet (2) all through bushing set up in positioning rod (5), the lower end of positioning hole on stator sheet (2) all outwardly expands and forms the first positioning groove of annular structure, the upper end of positioning hole on coil core (3) all outwardly expands and forms the second positioning groove of annular structure, the bushing (14) is opposite to the first positioning groove all outwardly expands and forms the positioning part (6) of annular structure, positioning part (6) all inserts the first positioning groove, the bushing (14) is opposite to the second positioning groove all is installed with the positioning ring (7), and the lower end of positioning ring (7) all inserts the second positioning groove, and the upper end of positioning rod (5) all is installed with locking ring (11), and the lower end of locking ring (11) all outwardly expands and forms the compact part (9) of ladder, and the lower end of compact part (9) all outwardly bends and forms the flanging (12) of annular structure, and the bottom surface of flanging (12) all with the top surface of coil core (3) is opposite; Positioning rod (5) is located above and below locking ring and is equipped with the insertion slot, and the insertion slot all inserts the positioning column (8), and the one end of positioning column (8) all extends to outside, and the other end all is installed with spring (13), and the one end of spring (13) away from positioning column all is installed on the inner wall surface of insertion slot, and the top surface of locking ring (11) all with the positioning column (8) of above is opposite, and the bottom surface of locking ring (11) all with the positioning column (8) of below is opposite.

2. The quartz watch movement stepper motor locking structure according to claim 1, characterized in that: The inner circle surface of positioning ring (7) all is equipped with first external thread, and the outer circle surface of bushing (14) is opposite to the first external thread and is equipped with first internal thread, and the first external thread of positioning ring (7) is all connected with the first internal thread on the bushing and is engaged.

3. The quartz watch movement stepper motor locking structure according to claim 1, characterized in that: The inner circle surface of locking ring (11) all is equipped with second external thread, and the outer circle surface of positioning rod (5) is opposite to the second external thread and is equipped with second internal thread, and the second external thread of locking ring (11) is all connected with the second internal thread on the positioning rod (5) and is engaged.

4. The quartz watch movement stepper motor locking structure according to claim 1, characterized in that: The bottom surface of compact part (9) all with the top surface of positioning ring (7) is opposite.

5. The quartz watch movement stepper motor locking structure according to claim 1, characterized in that: The thickness of positioning ring (7) all is greater than the depth of second positioning groove, and the upper end of positioning ring (7) all projects coil core setting, and the top surface of positioning ring (7) all is equipped with a plurality of insertion holes.

6. The quartz watch movement stepper motor locking structure according to claim 1, characterized in that: The cross section of insertion slot and positioning column (8) all is rectangular structure setting.

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