Swing motor facilitating size reduction

Abstract

The invention discloses a swing motor beneficial to effective volume. The swing motor comprises a main body piece, a stator coil assembly and a magnet, the main body piece comprises a mounting seat, a swinging seat and at least two elastic pieces which are arranged left and right at intervals, the two ends of the elastic pieces are connected with the swinging seat and the mounting seat respectively, and the mounting seat, the swinging seat and the elastic pieces are integrally formed in a simultaneous injection molding mode; the stator coil assembly is installed on the installation seat and located between the installation seat and the swing seat, and the magnet is arranged on the swing seat and adjacent to the stator coil assembly. Extending seats extend upwards from the left and right end parts of the mounting seat and are positioned on two sides of the swinging seat, and reset springs are arranged between the extending seats; a first mounting position for mounting the swing rod is arranged on the upper surface of the swing seat; the reset springs are arranged on the two sides of the swing base, the height of the reset springs is reduced, and the upper portion of the main body piece can be omitted, so that the overall height of the motor is reduced, the ratio of the height to the width is smaller, and the motor is smaller in size and wider in application range and application scene.

Description

Technical Field

[0001] The present invention relates to the field of furniture, and in particular to a swing motor which is advantageous for reducing the volume. Background Art

[0002] In electric personal care devices such as razors and electric clippers, the blades need to perform high-frequency reciprocating motion, which requires the help of a motor and a transmission structure. In the existing technology, the commonly used transmission structure is usually a motor driving an eccentric wheel to rotate at high speed. The eccentric wheel is connected to the end of the blade holder, thereby achieving high-frequency reciprocating motion of the blade. However, this technology has technical problems such as high wear and large size.

[0003] In order to solve the above technical problems, manufacturers have designed a brushless magnetic levitation motor. After this motor is energized, the coil assembly generates a magnetic field and continuously changes the direction of the magnetic field, thereby driving the swing seat with self-aligning ability to swing. The swing seat drives the blade to move through the drive rod. A magnet is provided inside the swing seat, and the magnetic field switches between forward and reverse directions in sequence. When subjected to a forward magnetic field, the swing seat swings in one direction. When the forward magnetic field ends and becomes a reverse magnetic field, the swing seat immediately returns to the forward direction and continues to swing in the reverse direction. When it switches to a forward magnetic field again, the swing seat swings in the first direction again, and swings back and forth continuously in sequence to complete the work. However, although the existing motors of this type reduce wear, their production and assembly are more complicated, and the production efficiency is low. The main reason is that there are still many internal parts, and the parts have become smaller, making assembly more difficult. At the same time, the assembly process is numerous, thereby reducing production efficiency.

[0004] There is a motor disclosed in Chinese invention application CN202410934197.X. This motor is relatively square, with a height-to-width ratio close to 1. The reason is that reset springs need to be set on both sides of the swinging direction of the swing seat to give it a reset elastic force and increase the strength and speed of the swing. Due to its structural limitations, the swing seat needs to extend upward to overlap with the external bracket to install the reset spring. This results in its size ratio and volume being limited, and the application scenarios are also limited, and it cannot be installed in miniature devices.

[0005] There are also some earlier flat motors that are similar or identical to Chinese invention patent CN201320171336.5. Although this type of motor reduces the ratio of height to width, due to the particularity of the setting of the elastic parts and the swing plate, it needs to be integrally molded with the magnet mounting base using the same material, which leads to very high requirements for the plastic material, and high production difficulty and cost. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides a swing motor that is conducive to reducing the volume, including a main body, a stator coil assembly and a magnet; the main body includes a mounting seat, a swing seat and at least two spring plates arranged at intervals on the left and right, the two ends of the spring plates are respectively connected to the swing seat and the mounting seat, and the mounting seat, the swing seat and the spring plates are integrally formed by injection molding; the stator coil assembly is installed on the mounting seat, located between the mounting seat and the swing seat, and the magnet is arranged on the swing seat and adjacent to the stator coil assembly; extension seats extend upward from the left and right ends of the mounting seat and are located on both sides of the swing seat, and a return spring is provided between the two; a first mounting position for installing a swing rod is provided on the upper surface of the swing seat; in this solution, the return springs are arranged on both sides of the swing seat. After reducing the height of the return spring, the upper part of the main body can be omitted, thereby greatly reducing the overall height of the motor, and the height-to-width ratio is smaller, making the motor smaller in size, with a wider range of adaptability and scenarios, and capable of being used in more products.

[0007] The technical solution of the present invention is achieved as follows: A swing motor that is conducive to reducing volume includes a main body, a stator coil assembly and a magnet; the main body includes a mounting seat, a swing seat and at least two spring plates, the two spring plates are arranged at intervals on the left and right, the two ends of the spring plates are respectively connected to the swing seat and the mounting seat, and the mounting seat, the swing seat and the spring plates are all formed in one piece; the stator coil assembly is arranged on the mounting seat and located between the mounting seat and the swing seat, and the magnet is arranged on the swing seat and adjacent to the stator coil assembly; the left and right ends of the mounting seat each have an upwardly extending extension seat, and the extension seat is located on the left and right sides of the swing seat; a return spring is respectively provided on the left and right sides of the swing seat, and the two ends of the return spring are respectively provided on the swing seat and the extension seat; a first mounting position is provided on the upper surface of the swing seat, and the first mounting position is configured to install a swing rod.

[0008] In this solution, the mounting seat, the swing seat and the spring are integrally formed by injection molding. The entire main body is a single component during assembly. The production and assembly of the motor can be completed by simply installing the stator coil assembly and the magnet thereon. Thanks to the motor having fewer components and a simplified structure, its production and assembly are simpler and faster, thereby improving production efficiency.

[0009] In the prior art, the return springs are arranged on both sides of the swing rod, that is, above the swing seat. Therefore, the motor of the prior art is forced to have a higher overall height to accommodate the installation of the return spring. However, in this solution, the return springs are arranged on both sides of the swing seat. After the height of the return spring is reduced, the upper part of the main body can be omitted, thereby greatly reducing the overall height of the motor and making the height-to-width ratio smaller, making the motor smaller in size, with a wider range of adaptability and scenarios, and able to be used in more products.

[0010] The shrapnel and return spring in this solution are both made of conventional materials, with low production difficulty and cost, which overcomes the problems existing in early flat motors.

[0011] The first mounting position is formed by a downward depression of a portion of the upper surface of the swing seat. Swing rods of different styles can be set on the swing seat as long as they have a seat that matches the first mounting position. Since various styles of swing rods can be set, the motor has a wider range of applications and can be applied to different products.

[0012] Preferably, there are two swinging seats, each of which is provided with a magnet, and the two magnets are arranged with opposite magnetic properties. In this solution, after the swinging rod and the blade are connected to both swinging seats, a single drive of the stator coil assembly can cause the two swinging seats to swing in opposite directions, thereby improving working efficiency.

[0013] Preferably, there are two spring clips, each with a dividing groove extending from top to bottom, which divides the upper and middle portions of the spring clip into front and back sections. The lower portion of the spring clip is intact and forms a lower connecting portion, which is fixedly connected to the mounting base. The upper portion of the spring clip is divided into two upper connecting portions, which are respectively fixedly connected to the two swinging seats. This unique design of the spring clip allows each motor to achieve double swing with only two spring clips, meaning only one spring clip is needed on each side, further reducing the number of components and lowering production costs.

[0014] Preferably, the upper connecting portion and the lower connecting portion are both provided with injection holes. When the spring piece, the mounting seat and the swing seat are integrally injection-molded, the mounting seat and the swing seat will naturally enter the injection holes, thereby making the injection molding more secure.

[0015] Preferably, the middle part of the spring piece is hollowed out due to the action of the dividing groove.

[0016] Preferably, the hollowing is distributed in strips, and the shape of the hollowing is elliptical or rectangular.

[0017] Preferably, a boss is provided on the side end surface of the swing seat, the boss protruding from the side end surface, and a groove is provided on the end surface of the extension seat facing the swing seat, one end of the return spring is sleeved on the boss, and the other end of the return spring is arranged in the groove, thereby firmly installing the return spring.

[0018] Preferably, the mounting base is roughly U-shaped, and the swinging base, the spring clip, and the stator coil assembly are all located in the mounting base in the left-right direction. The mounting base encloses the swinging base, the spring clip, and the stator coil, so its width-wise ratio is larger. The mounting base includes a horizontal base and two vertical bases located at both ends of the horizontal base. The spring clip is arranged on the horizontal base, and there is a gap between the vertical base and the spring clip. There is also a gap between the spring clip and the stator coil assembly. The extension base is part of the vertical base, and the thickness of the extension base in the left-right direction is thinner than that of the remaining part of the vertical base. The gap between the extension base and the swinging base is larger than the gap between the vertical base and the spring clip. In the prior art, since the reset spring requires a certain gap for installation, it is installed on both sides of the swinging rod, and there is insufficient installation space on both sides of the swinging base. In this solution, by increasing the width ratio of the mounting base, there is sufficient space between the swinging base and the extension base to install the reset spring, so that the overall height of the motor can be reduced.

[0019] Preferably, reinforcement plates are provided on both front and rear end surfaces of the mounting seat, and the reinforcement plates are configured to fix the stator coil assembly in the front-to-back direction.

[0020] Preferably, the distance between the top surface of the swing seat and the bottom surface of the mounting seat is the motor height, the distance between the left and right end surfaces of the mounting seat is the motor width, and the ratio of the motor height to the motor width is no greater than 0.58. Taking a razor as an example, since the swing motor, which is conducive to reducing the volume, also needs to be installed with a swing rod to connect the blades, the height of the product will be further increased. If a motor with a height-to-width ratio close to 1 is used, the product can only be in the form of a long strip, which occupies a large volume, and the product wastes a lot of space, causing inconvenience in placing or carrying in daily life. The lower aspect ratio of the internal motor makes the aspect ratio of the complete product more controllable, thereby making the product more compact and easy to carry.

[0021] Preferably, the swing seat is a strip-shaped body arranged horizontally in the left-right direction, and the length of the swing seat in the left-right direction is smaller than the length of the mounting seat in the left-right direction; the height of the extension seat is configured to at least exceed the lower end of the swing seat and provide a mounting position for the reset spring; there is a gap between the extension seat and the swing seat, and the reset spring is horizontally arranged between the end face of the swing seat and the end face of the extension seat in the left-right direction.

[0022] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: In this solution, the mounting seat, the swing seat and the spring are integrally formed by injection molding. The entire main body is a single component during assembly. The production and assembly of the motor can be completed by simply installing the stator coil assembly and the magnet thereon. Thanks to the motor having fewer components and a simplified structure, its production and assembly are simpler and faster, thereby improving production efficiency.

[0023] In the prior art, the return springs are arranged on both sides of the swing rod, that is, above the swing seat. Therefore, the motor of the prior art is forced to have a higher overall height to accommodate the installation of the return spring. However, in this solution, the return springs are arranged on both sides of the swing seat. After the height of the return spring is reduced, the upper part of the main body can be omitted, thereby greatly reducing the overall height of the motor and making the height-to-width ratio smaller, making the motor smaller in size, with a wider range of adaptability and scenarios, and able to be used in more products.

[0024] The shrapnel and return spring in this solution are both made of conventional materials, with low production difficulty and cost, which overcomes the problems existing in early flat motors.

[0025] The first mounting position is formed by a downward depression of a portion of the upper surface of the swing seat. Swing rods of different styles can be set on the swing seat as long as they have a seat that matches the first mounting position. Since various styles of swing rods can be set, the motor has a wider range of applications and can be applied to different products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the three-dimensional structure of the swing motor that is beneficial to reducing the volume in an embodiment of the present invention; Figure 2 An exploded view of the swing motor that is beneficial for reducing the volume in an embodiment of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the main body in an embodiment of the present invention; Figure 4 It is a front view of the main body in an embodiment of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the reset spring installed between the swing seat and the extension seat in the embodiment of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the spring in an embodiment of the present invention.

[0027] The figures are marked as follows: main body 1; mounting seat 11; horizontal seat 111; vertical seat 112; swing seat 12; groove 121; first mounting position 122; spring piece 13; separation groove 131; lower connecting portion 132; upper connecting portion 133; injection hole 134; stator coil assembly 2; magnet 3; return spring 4; extension seat 5; boss 51; reinforcement plate 6. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] The specific implementation of the present invention is as follows: like Figure 1 、 2 As shown, the present invention provides a swing motor that is conducive to reducing the volume, including a main body 1, a stator coil assembly 2 and a magnet 3; the main body 1 includes a mounting seat 11, a swing seat 12 and at least two springs 13, the two springs 13 are arranged at intervals on the left and right, and the two ends of the springs 13 are respectively connected to the swing seat 12 and the mounting seat 11, and the mounting seat 11, the swing seat 12 and the springs 13 are all integrally formed; the stator coil assembly 2 is arranged on the mounting seat 11 and is located between the mounting seat 11 and the swing seat 12, and the magnet 3 is arranged on the swing seat 12 and is adjacent to the stator coil assembly 2.

[0032] In this solution, the mounting base 11, the swing base 12 and the spring 13 are integrally formed by injection molding together. The entire main body 1 is a single component during assembly. It is only necessary to install the stator coil assembly 2 and the magnet 3 thereon to complete the production and assembly of the motor. Thanks to the motor having fewer components and a simplified structure, its production and assembly are simpler and faster, thereby improving production efficiency.

[0033] Specifically, if Figure 1-3 As shown, there are two swing seats 12, and magnets 3 are provided under the two swing seats 12, and the two magnets 3 are arranged with opposite magnetic properties; after the two swing seats 12 are connected to the swing rod and the blade, a single drive of the stator coil assembly 2 can make the two swing seats 12 swing in opposite directions, and the working efficiency is higher; there are two spring clips 13, and the spring clip 13 is provided with a dividing groove 131 from top to bottom, and the dividing groove 131 is configured to divide the upper and middle parts of the spring clip 13 front and back; the lower part of the spring clip 13 is complete and forms a lower connecting part 132, and the lower connecting part 132 is fixedly connected to the mounting seat 11, and the upper part of the spring clip 13 is divided into two upper connecting parts 133, and the two upper connecting parts 133 are respectively fixedly connected to the two swing seats 12; through the unique design of the spring clip 13, each motor only needs two spring clips 13 to achieve double swing, that is, only one spring clip 13 is needed on one side, which further reduces the number of components and reduces the production cost.

[0034] The mounting base 11 is generally U-shaped. In the left-right direction, the swing base 12, the spring 13 and the stator coil assembly 2 are all located in the mounting base 11. The mounting base 11 surrounds the swing base 12, the spring 13 and the stator coil, so its proportion in the width direction is larger. Specifically, as Figure 2-5 As shown, the mounting seat 11 includes a horizontal seat 111 and two vertical seats 112 located at both ends of the horizontal seat 111. The spring 13 is arranged on the horizontal seat 111, and there is a gap between the vertical seat 112 and the spring 13; there is also a gap between the spring 13 and the stator coil assembly 2; the left and right ends of the mounting seat 11 are each provided with an upwardly extending extension seat 5, the extension seat 5 is a part of the vertical seat 112, and the extension seat 5 is located on the left and right sides of the swing seat 12, and the two are at the same height; a return spring 4 is provided on each left and right side of each swing seat 12, and the return spring 4 is arranged along the left and right directions. The two ends of the reset spring 4 are respectively arranged on the swing seat 12 and the extension seat 5; in the prior art, the reset spring 4 is arranged on both sides of the swing rod, that is, above the swing seat 12, so the motor of the prior art is forced to have a higher overall height to adapt to the installation of the reset spring 4; but in this solution, the reset spring 4 is arranged on both sides of the swing seat 12. After the height of the reset spring 4 is reduced, the upper part of the main body 1 can be omitted, thereby greatly reducing the overall height of the motor, making the motor smaller in size, and having a wider range of adaptability and scenarios, and can be used in more products.

[0035] Furthermore, the extension seat 5 is a part of the vertical seat 112, and the thickness of the extension seat 5 in the left and right directions is thinner than the thickness of the rest of the vertical seat 112, and the gap between the extension seat 5 and the swing seat 12 is larger than the gap between the vertical seat 112 and the spring 13; in the prior art, since the reset spring 4 requires a certain gap to be installed, it is installed on both sides of the swing rod, and there is not enough installation space on both sides of the swing seat 12. In this solution, by increasing the ratio of the width of the mounting seat 11, there is enough space between the swing seat 12 and the extension seat 5 to install the reset spring 4, so that the overall height of the motor can be reduced.

[0036] A groove 121 is provided on the side end face of the swing seat 12, and a boss 51 is provided on the end face of the extension seat 5 facing the swing seat 12. One end of the return spring 4 is arranged on the groove 121, and the other end of the return spring 4 is arranged on the boss 51, so that the return spring 4 is firmly installed.

[0037] In addition, a first mounting position 122 is provided on the upper surface of the swing seat 12, and the first mounting position 122 is configured to install a swing rod; the first mounting position 122 is formed by a downward depression of a portion of the upper surface of the swing seat 12, and different styles of swing rods only need to have a seat that matches the first mounting position 122 to be set on the swing seat 12. Since various styles of swing rods can be set, the motor has a wider range of applications and can be applied to different products.

[0038] like Figure 6 As shown, an injection hole 134 is provided on the upper connecting portion 133 and the lower connecting portion 132 of the spring piece 13. When the spring piece 13, the mounting seat 11 and the swing seat 12 are integrally injection-molded, the mounting seat 11 and the swing seat 12 will naturally enter the injection hole 134, thereby making the injection molding more secure; the middle part of the spring piece 13 is hollowed out under the action of the dividing groove 131, and the hollowing is elliptical.

[0039] like Figure 1 、 2 As shown, reinforcing plates 6 are fixedly provided on both the front and rear end surfaces of the mounting seat 11, and the reinforcing plates 6 are configured to fix the stator coil assembly 2 in the front-to-back direction; the cross seat 111 is thinned, and the reinforcing plate 6 has a corresponding protrusion thereat, and the protrusion of the reinforcing plate 6 enters the space formed by the thinning thereat; the reinforcing plate 6 is fixed to the mounting seat 11 by screws; the reinforcing plate 6 is made of resin injection molding.

[0040] To be more specific, the distance between the top surface of the swing seat 12 and the bottom surface of the mounting seat 11 is the motor height, the distance between the left and right end surfaces of the mounting seat 11 is the motor width, and the ratio of the motor height to the motor width is not greater than 0.58. In this embodiment, the motor height is 19.5 mm, the motor width is 35 mm, and the ratio of the two is about 0.56; taking the razor as an example, since the swing motor that is conducive to reducing the volume also needs to install a swing rod to connect the blade, the height of the product will be further increased. If a motor with a height-to-width ratio close to 1 is used, the product can only be in the shape of a long strip, the volume is large, and the product wastes a lot of space, causing inconvenience in placement or carrying in daily life; the lower aspect ratio of the internal motor makes the aspect ratio of the complete product more controllable, thereby making the product more compact and easy to carry.

[0041] The swing seat 12 is a strip-shaped body arranged horizontally along the left-right direction. The length of the swing seat 12 in the left-right direction is smaller than the length of the mounting seat 11 in the left-right direction. The height of the extension seat 5 is configured to at least exceed the lower end of the swing seat 12 and provide an installation position for the reset spring 4. There is a gap between the extension seat 5 and the swing seat 12, and the reset spring 4 is horizontally arranged along the left-right direction between the end face of the swing seat 12 and the end face of the extension seat 5. In this embodiment, the gap between the extension seat 5 and the swing seat 12 is 4.25 mm, accounting for approximately 12% of the total width, to accommodate the reset spring 4.

Claims

1. A swing motor that is beneficial for reducing the size, characterized by: It includes a main body, a stator coil assembly and a magnet; the main body includes a mounting seat, a swing seat and at least two spring plates, the two spring plates are arranged at intervals on the left and right, the two ends of the spring plates are respectively connected to the swing seat and the mounting seat, and the mounting seat, the swing seat and the spring plates are all formed in one piece; the stator coil assembly is arranged on the mounting seat and located between the mounting seat and the swing seat, and the magnet is arranged on the swing seat and adjacent to the stator coil assembly; the left and right ends of the mounting seat each have an upwardly extending extension seat, and the extension seat is located on the left and right sides of the swing seat; a return spring is respectively provided on the left and right sides of the swing seat, and the two ends of the return spring are respectively provided on the swing seat and the extension seat; a first mounting position is provided on the upper surface of the swing seat, and the first mounting position is configured to install a swing rod.

2. The oscillating motor with reduced volume according to claim 1, characterized in that: There are two swing seats, and magnets are arranged under the two swing seats, and the two magnets are arranged with opposite magnetic properties.

3. The oscillating motor with reduced volume according to claim 2, characterized in that: There are two spring pieces in total. The spring pieces are provided with dividing grooves from top to bottom, and the dividing grooves are configured to divide the upper and middle parts of the spring piece front and back; the lower part of the spring piece is complete and forms a lower connecting part, which is fixedly connected to the mounting seat, and the upper part of the spring piece is divided into two upper connecting parts, which are respectively fixedly connected to the two swing seats.

4. The oscillating motor with reduced volume according to claim 3, characterized in that: Injection holes are provided on both the upper connecting part and the lower connecting part.

5. The oscillating motor with reduced volume according to claim 3, characterized in that: The middle part of the shrapnel is hollowed out due to the action of the dividing groove.

6. The oscillating motor with reduced volume according to claim 5, characterized in that: The hollowing is distributed in strips, and the shape of the hollowing is oval or rectangular.

7. The oscillating motor with reduced volume according to claim 1, characterized in that: A groove is provided on the side end surface of the swing seat, a boss is provided on the end surface of the extension seat facing the swing seat, one end of the return spring is sleeved on the boss, and the other end of the return spring is arranged in the groove.

8. The oscillating motor with reduced volume according to claim 1, characterized in that: The mounting seat is roughly U-shaped. In the left and right directions, the swing seat, the spring and the stator coil assembly are all located in the mounting seat.

9. The oscillating motor with reduced volume according to claim 1, characterized in that: Reinforcement plates are provided on both front and rear end surfaces of the mounting seat, and the reinforcement plates are configured to fix the stator coil assembly in the front and rear directions.

10. The oscillating motor with reduced volume according to claim 9, characterized in that: The reinforcement plate and the mounting base are fixed by screws.

11. The oscillating motor with reduced volume according to claim 1, characterized in that: The distance between the top surface of the swing seat and the bottom surface of the mounting seat is the motor height, the distance between the left and right end surfaces of the mounting seat is the motor width, and the ratio of the motor height to the motor width is not greater than 0.

58.

12. The oscillating motor with reduced volume according to claim 1, characterized in that: The swing seat is a strip-shaped body arranged horizontally in the left-right direction, and the length of the swing seat in the left-right direction is smaller than the length of the mounting seat in the left-right direction; the height of the extension seat is configured to at least exceed the lower end of the swing seat and provide an installation position for the reset spring; there is a gap between the extension seat and the swing seat, and the reset spring is horizontally arranged between the end face of the swing seat and the end face of the extension seat in the left-right direction.

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