VCM (voice coil motor) centrally-mounted motor

Abstract

The utility model discloses a VCM (voice coil motor) centrally-mounted motor, which comprises a motor base, a motor shell arranged at the top end of the motor base, a motor carrier arranged at the top end of the motor base, an upper elastic sheet arranged on the motor carrier, a lower elastic sheet arranged below the motor carrier, and a magnet main body arranged on the outer ring of the motor carrier, a coil body is arranged outside the magnet body, and a limiting groove is formed in the top end of the motor shell. According to the VCM built-in motor, after the terminal is electrified, the coil body generates magnetic force, and under the action of a magnetic field of the magnet body, the motor carrier and the coil body are driven to vertically move along with the magnitude of current, move upwards after being electrified by positive current and move downwards after being electrified by negative current, so that a focusing function is realized, a closed-loop control system is not needed, and the structure simplifies a Hall element closed-loop control system and is convenient to operate. Focusing is achieved only through current driving, the cost is reduced, and the problem that the manufacturing cost is high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mid-mounted motors, in particular to a VCM mid-mounted motor. Background Art

[0002] VCM refers to the voice coil motor in electronics, which is a type of motor. The VCM mid-mounted motor is also called a voice coil motor. The principle of a voice coil motor is to control the position of the VCM motor by changing the size of the VCM coil current in a fixed magnetic field, thereby changing the distance between the lenses to achieve the focusing function. The VCM motor is mainly composed of a shell, a base, a magnet, upper and lower springs and a carrier. The shell and the base are fixed parts. The magnet is fixed around the shell. The coil is wrapped around the outer ring of the carrier and is integrated with the carrier. The carrier is located between the upper and lower springs and suspended in the magnetic field space in the inner cavity formed by the base and the shell. When the coil is energized, under the action of the Ampere force, the carrier can move up and down, driving the lens to achieve the focusing function. Voice coil motors are mainly used for small strokes, high speeds, and high acceleration movements, and are suitable for use in narrow spaces.

[0003] After searching, according to a VCM motor disclosed in application number CN202121604330.3, the article mentions "a lower spring piece used for elastic movement of the lens, the lower spring piece is a split structure, the lower spring piece includes four first lower spring pieces and the same number of second lower spring pieces, the second lower spring pieces are arranged on the inner side of the first lower spring pieces, the second lower spring pieces are in a "H" shape, the end of the second lower spring piece is fixedly connected to the inner side of the first upper spring piece, the head end of the second lower spring piece is fixedly connected to the third lower spring piece, the first lower spring piece, the second lower spring piece and the third lower spring piece are fixedly connected to the inner side of the first upper spring piece, and the first lower spring piece, the second lower spring piece and the third lower spring piece are fixedly connected to the inner side of the first upper spring piece. The lower spring block is an integrated structure, the third lower spring block is in a "I" shape, and the open end of the third lower spring block extends to the inner side of the adjacent first lower spring block; the internal frame is eliminated inside the lower spring piece, increasing the available space inside the motor; by providing welding holes at the third lower spring block, multiple welding positions are added to the lower spring piece, thereby improving the reliability and conductivity of the motor. The VCM motor in the above application adopts the common Hall element to form a closed-loop control system when in use. The Hall element installed inside the voice coil motor to form a closed-loop control system has a high manufacturing cost.

[0004] There is an urgent need for a VCM mid-mounted motor to solve the technical defects raised in the above-mentioned technology. Utility Model Content

[0005] The purpose of the utility model is to provide a VCM mid-mounted motor to solve the problem of high cost in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a VCM mid-mounted motor, comprising a motor base, a motor housing is installed at the top of the motor base, a motor carrier is arranged at the top of the motor base, an upper spring sheet is arranged on the motor carrier, a lower spring sheet is arranged below the motor carrier, a magnet body is arranged on the outer ring of the motor carrier, a coil body is arranged outside the magnet body, a limiting groove is arranged at the top of the motor housing, and a connecting terminal is installed at the top of the motor base.

[0007] Preferably, the motor housing is covered on the outside of the magnet body, and the bottom end of the motor housing is fixedly connected to the top end of the motor base.

[0008] Preferably, the magnet body is arranged between the motor housing and the motor carrier.

[0009] Preferably, the top end of the connecting terminal is arranged at the top end of the motor base, and the connecting terminal is fixed to the lower spring sheet by laser welding.

[0010] Preferably, four groups of the limiting grooves are provided, and the limiting grooves are installed at the four corners of the top end of the motor housing.

[0011] Preferably, the upper spring plates are arranged between the motor housing and the motor carrier, and the upper spring plates are evenly distributed on the top of the motor carrier.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the VCM mid-mounted motor not only realizes the function of reducing costs, realizes the function of facilitating position limiting, but also realizes the function of facilitating protection;

[0013] By providing a motor carrier, a coil body and a magnet body, the lower spring sheet inside the motor is connected to the connection terminal by laser welding, the motor carrier and the coil body are in the initial middle position, and the coil body generates magnetic force after the connection terminal is energized. Under the action of the magnetic field of the magnet body, the motor carrier and the coil body are driven to move vertically with the current. When a positive current is passed, the coil body moves upward, and when a negative current is passed, the coil body moves downward, thereby realizing the focusing function without the need for a closed-loop control system. This structure simplifies the closed-loop control system of the Hall element, and relies solely on current drive to achieve focusing, thereby reducing costs.

[0014] By providing a motor base and a limiting groove, the limiting groove on the motor housing can limit the motor during use and installation. The limiting grooves are evenly distributed at the four corners of the top of the motor housing. The limiting grooves can evenly limit and position the motor. The mounting holes at the bottom of the motor base can assist in installation and fixing. This structure realizes the functions of facilitating positioning and stable installation.

[0015] By providing a motor housing, an upper spring sheet and a lower spring sheet, the motor housing covers the outside of the motor carrier and the magnet body, and the motor housing wraps and protects the motor carrier and the magnet body. The upper spring sheet and the lower spring sheet on the motor housing can not only assist in the use of the motor, but also facilitate the limiting and protection of the motor carrier and the magnet body. This structure realizes the protection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front three-dimensional cross-sectional structure of the utility model;

[0017] Figure 2 It is a top view of the three-dimensional structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0019] Figure 4 It is a front view cross-sectional structural schematic diagram of the utility model.

[0020] In the figure: 1. Motor base; 2. Motor housing; 3. Upper spring piece; 4. Motor carrier; 5. Coil body; 6. Magnet body; 7. Lower spring piece; 8. Connection terminal; 9. Limiting groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4 A VCM mid-mounted motor comprises a motor base 1, a motor housing 2 is mounted on the top of the motor base 1, a motor carrier 4 is mounted on the top of the motor base 1, an upper spring sheet 3 is mounted on the motor carrier 4, a lower spring sheet 7 is mounted below the motor carrier 4, a magnet body 6 is mounted on the outer ring of the motor carrier 4, a coil body 5 is mounted outside the magnet body 6, a limiting groove 9 is mounted on the top of the motor housing 2, and a connecting terminal 8 is mounted on the top of the motor base 1;

[0023] The motor housing 2 is covered on the outside of the magnet body 6, the bottom end of the motor housing 2 is fixedly connected to the top end of the motor base 1, and the magnet body 6 is arranged between the motor housing 2 and the motor carrier 4;

[0024] Specifically, Figure 1 and Figure 2As shown, the motor carrier 4 and the coil body 5 are in the initial middle position. After the connecting terminal 8 is energized, the coil body 5 generates magnetic force. Under the action of the magnetic field of the magnet body 6, the motor carrier 4 and the coil body 5 are driven to move vertically with the current size. When a positive current is passed, they move upward, and when a negative current is passed, they move downward, thereby realizing the focusing function. No closed-loop control system is required, which reduces costs.

[0025] Embodiment 2: The top of the connecting terminal 8 is arranged at the top of the motor base 1, the connecting terminal 8 is fixed to the lower spring sheet 7 by laser welding, four groups of limiting grooves 9 are arranged, and the limiting grooves 9 are installed at the four corners of the top of the motor housing 2;

[0026] Specifically, Figure 1 and Figure 3 As shown, the limiting grooves 9 can limit the motor during its use and installation. The limiting grooves 9 are evenly distributed at the four corners of the top of the motor housing 2. The limiting grooves 9 can evenly limit and position the motor.

[0027] Embodiment 3: The upper spring sheet 3 is arranged between the motor housing 2 and the motor carrier 4, and the upper spring sheet 3 is evenly distributed on the top of the motor carrier 4;

[0028] Specifically, Figure 1 and Figure 4 As shown, the motor housing 2 wraps and protects the motor carrier 4 and the magnet body 6. The upper spring plate 3 and the lower spring plate 7 on the motor housing 2 can not only assist the use of the motor, but also facilitate the limiting and protection of the motor carrier 4 and the magnet body 6.

[0029] Working principle: When the utility model is in use, the motor equipment needs to be installed in the designated area first. The motor base 1 of the central motor is provided with a mounting hole. The mounting hole and the bolt can be used to install the central motor by auxiliary use when viewed from above. The limiting groove 9 on the motor housing 2 can limit the motor during its use and installation. The limiting grooves 9 are evenly distributed at the four corners on the top of the motor housing 2. The limiting grooves 9 can uniformly limit and position the motor. The motor carrier 4 and the coil body 5 are in the initial middle position. After the connecting terminal 8 is energized, the coil body 5 generates a magnetic force. Under the action of the magnetic field of the magnet body 6, the motor carrier 4 and the coil body 5 are driven to move vertically with the current. When a positive current is passed, it moves upward, and when a negative current is passed, it moves downward, thereby realizing the focusing function. No closed-loop control system is required. The motor housing 2 wraps the motor carrier 4 and the magnet body 6 for protection. The upper spring piece 3 and the lower spring piece 7 on the motor housing 2 can not only assist the use of the motor, but also facilitate the limiting and protection of the motor carrier 4 and the magnet body 6. This structure realizes the protection function.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A VCM mid-mounted motor, comprising a motor base (1), characterized in that: A motor housing (2) is installed at the top of the motor base (1), a motor carrier (4) is arranged at the top of the motor base (1), an upper spring sheet (3) is arranged on the motor carrier (4), a lower spring sheet (7) is arranged below the motor carrier (4), a magnet body (6) is arranged on the outer ring of the motor carrier (4), a coil body (5) is arranged outside the magnet body (6), a limiting groove (9) is arranged at the top of the motor housing (2), and a connecting terminal (8) is installed at the top of the motor base (1).

2. A VCM mid-mounted motor according to claim 1, characterized in that: The motor housing (2) is covered on the outside of the magnet body (6), and the bottom end of the motor housing (2) is fixedly connected to the top end of the motor base (1).

3. A VCM mid-mounted motor according to claim 1, characterized in that: The magnet body (6) is arranged between the motor housing (2) and the motor carrier (4).

4. The VCM mid-mounted motor according to claim 1, characterized in that: The top end of the connecting terminal (8) is arranged at the top end of the motor base (1), and the connecting terminal (8) is fixed to the lower spring sheet (7) by laser welding.

5. The VCM mid-mounted motor according to claim 1, characterized in that: Four groups of the limiting grooves (9) are provided, and the limiting grooves (9) are installed at the four corners of the top end of the motor housing (2).

6. The VCM mid-mounted motor according to claim 1, characterized in that: The upper spring sheets (3) are arranged between the motor housing (2) and the motor carrier (4), and the upper spring sheets (3) are evenly distributed on the top of the motor carrier (4).

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