A touch vibration feedback electromagnet structure used in automobile decorative panels

Abstract

This invention relates to the field of automotive trim panel technology, specifically to a touch vibration feedback electromagnet structure for automotive trim panels. The structure includes a housing, which has a barrel-like structure with a circular hole at the bottom. A coil frame is placed inside the housing, and copper wires are attached to the coil frame. These copper wires are connected to a wiring harness plug via electrical wires. A fixed iron core, shaped like an inverted convex character, is located in the middle of the coil frame. The beneficial effects of this invention are: the fixed iron core has a notch on its outer wall, meaning it is thinnest at this point. Magnetic resistance is generated at this thinnest point, causing the moving iron core to move in the direction where the magnetic circuit tends to close when passing through the fixed iron core, resulting in downward movement. Due to the notch, the magnetic flux passing through the moving iron core does not change significantly during the stroke. Before the electromagnetic force is attracted, there is a gradual stroke along the entire stroke; this stroke is the effective stroke of the electromagnet.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile decorative panels, and in particular to a touch vibration feedback electromagnet structure applied to automobile decorative panels. Background Art

[0002] As the application of touch vibration feedback technology in automotive interior switches becomes more and more common, the requirements for the size and linearity of the touch vibration feedback force are getting higher and higher. Since it needs to be installed inside the automotive interior switch module, its height tends to be shorter.

[0003] Current technologies such as CN212267386U and CN206294144U rely on vibration motors to achieve vibration feedback. Document CN109976529A only proposes using electromagnets to replace vibration motors to achieve vibration feedback, but does not elaborate on the specific structure of the electromagnets. Vibration motors have the following obvious disadvantages: 1. Obvious noise; 2. Electromagnetic force cannot meet linear requirements; 3. High cost and short life compared to electromagnets; 4. High power and high power consumption. Summary of the invention

[0004] In response to the problem, the present invention provides a touch vibration feedback electromagnet structure applied to automobile decorative panels, including an outer shell, which is a barrel-shaped structure with a round hole at the bottom, a coil skeleton is placed in the outer shell, copper wires are arranged on the coil skeleton, and the copper wires are connected to a wiring harness plug through electric wires; a fixed iron core is arranged in the middle of the coil skeleton, the fixed iron core is an inverted convex structure, and the middle of the fixed iron core is in a through hole state, the upper part of the fixed iron core is located in the middle of the coil skeleton, and the fixed iron core cooperates with the lower annular raised baffle of the outer shell; a push rod passes through the middle of the fixed iron core, and a spring is sleeved on the outside of the push rod; the top of the push rod is cooperated with a moving iron core.

[0005] As a further technical feature of the present invention, a cover plate is installed on the upper side of the shell.

[0006] As a further technical feature of the present invention, the cross section of the coil frame is I-shaped, the copper wire is installed on the side wall of the coil frame, and a through hole is opened in the middle of the coil frame.

[0007] As a further technical feature of the present invention, a notch is provided on the outer side wall of the fixed iron core.

[0008] As a further technical feature of the present invention, the cross section of the notch is V-shaped.

[0009] As a further technical feature of the present invention, a matching groove with an opening facing downward is provided at the lower part of the moving iron core, and the head of the push rod matches with the matching groove.

[0010] As a further technical feature of the present invention, a first bearing is installed in the middle of the fixed iron core, and the push rod cooperates with the first bearing.

[0011] As a further technical feature of the present invention, a second bearing is installed at the end of the moving iron core.

[0012] As a further technical feature of the present invention, a rubber cap is connected to the bottom end of the push rod.

[0013] As a further technical feature of the present invention, it also includes Teflon cloth, and the Teflon cloth is wrapped on the outer cylindrical surface of the moving iron core.

[0014] The beneficial effects of the present invention are:

[0015] 1. The outer shell is cylindrical, and its inner diameter should be equal to the maximum diameter of the coil frame. On the one hand, the coil frame will not fall off the outer shell, and on the other hand, the two cooperate with each other to achieve stable installation and will not shake during operation;

[0016] 2. There is a gap on the outer wall of the fixed core, which means that the fixed core is the thinnest here. Magnetic resistance can be generated at the thinnest point, so that when the moving core passes through the fixed core, the moving core moves in the direction where the magnetic circuit tends to close. At this time, the moving core moves downward. Due to the existence of the gap, the magnetic flux passing through the moving core does not change much in the stroke, and the electromagnetic force will have a gentle stroke in the entire stroke before it is attracted. This stroke is the effective stroke of the electromagnet.

[0017] 3. The moving iron core and the push rod are combined into one body and move inside the vibration feedback electromagnet, which needs to be guided. Here, Teflon flannel is wrapped on the outer cylindrical surface of the moving iron core. The Teflon flannel can reduce the friction between the moving iron core and the fixed iron core;

[0018] 4. The first bearing and the second bearing are provided for the same purpose as the Teflon cloth, which can reduce resistance and improve the guiding effect;

[0019] 5. Since electromagnetic force is used to achieve touch vibration feedback, it will not produce noise pollution and will not affect the driving experience; in addition, its electromagnetic force is linear and stable within the effective stroke size; it is low-cost, more cost-effective than the vibration motor in the existing technology, and the power consumption is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 AA section view in the figure;

[0023] Figure 3 It is a structural schematic diagram of the fixed iron core of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the moving iron core of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of Example 2 of the present invention.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as described in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Embodiment 1:

[0031] Combination Figure 1 In an embodiment of the present invention, a touch vibration feedback electromagnet structure applied to a car decorative panel comprises a housing 4, the housing 4 is a barrel structure, and a round hole is opened at the bottom, and a coil skeleton 2 is placed in the housing 4;

[0032] In the embodiment of the present invention, the shell 4 wraps the coil frame 2 inside, and the cover plate 1 is used to completely seal the coil frame 2, so that the position of the coil frame 2 can be kept fixed and installed;

[0033] A through hole is left at the bottom of the housing 4 for other parts to pass through or be installed; in terms of overall appearance, the housing 4 is cylindrical, and the inner diameter thereof should be equal to the maximum diameter of the coil frame 2, so that the coil frame 2 will not fall from the housing 4, and on the other hand, the two cooperate with each other to achieve stable installation, and will not shake during operation;

[0034] A copper wire 3 is arranged on the coil skeleton 2, and the copper wire 3 is connected to a wiring harness plug 12 through an electric wire. The plug 12 is connected to an external power supply and is used to energize the copper wire 3; a fixed iron core 5 is arranged in the middle of the coil skeleton 2, and the fixed iron core 5 is in an inverted convex structure. A notch is opened on the outer wall of the fixed iron core 5, and the middle of the fixed iron core 5 is in a through hole state. The upper part of the fixed iron core 5 is located in the middle of the coil skeleton 2, and the fixed iron core 5 cooperates with the lower annular raised baffle of the outer shell 4; a push rod 8 passes through the middle of the fixed iron core 5, and a spring 6 is sleeved on the outside of the push rod 8, and a rubber cap 7 is connected to the bottom end of the push rod 8; the top of the push rod 8 is matched with a moving iron core 11.

[0035] In this embodiment, a notch is designed on the outer wall of the fixed iron core 5, that is, the fixed iron core 5 is thinnest here, and magnetic resistance can be generated at the thinnest point, so that when the moving iron core 11 passes through the fixed iron core 5, the moving iron core 11 moves in the direction in which the magnetic circuit tends to be closed, and the moving iron core 11 moves downward at this time; due to the existence of the notch, the magnetic flux passing through the moving iron core 11 does not change much in the stroke, and the electromagnetic force will have a smooth stroke in the entire stroke before being attracted, and this stroke is the effective stroke of the electromagnet.

[0036] In this embodiment, the setting of the rubber cap 7 can limit the spring 6 to prevent the spring 6 from falling off the push rod 8, and the rubber cap 7 plays the role of a spring seat; here the push rod 8 is in an extended state under the action of the spring 6.

[0037] In the present invention, since electromagnetic force is used to achieve touch vibration feedback, it will not generate noise pollution and will not affect the driving experience; in addition, its electromagnetic force is linear and stable within the effective stroke size; it is low in cost, more cost-effective than the vibration motor in the prior art, and has relatively low power consumption.

[0038] The cross section of the coil frame 2 is I-shaped, the copper wire 3 is installed on the side wall of the coil frame 2, and a through hole is opened in the middle of the coil frame 2.

[0039] In this embodiment, as can be seen from the diagram, a ring-shaped empty space is provided on the side wall of the coil frame 2, and the copper wire 3 can be vertically installed in the empty space. A plurality of copper wires 3 are provided, which are evenly arranged in a circle on the coil frame 2 to provide a stable and uniform magnetic flux for the movement of the moving iron core 11.

[0040] Generally speaking, at least three copper wires 3 are provided, and the circumferential angle between them is 120 degrees. The three copper wires 3 are connected in series and connected to an external power source.

[0041] It also includes a Teflon velvet cloth 10, which is wrapped on the outer cylindrical surface of the moving iron core 11. The moving iron core 11 and the push rod 8 are combined into one body and move inside the vibration feedback electromagnet, which needs to be guided. Here, the Teflon velvet cloth 10 is wrapped on the outer cylindrical surface of the moving iron core 11. The Teflon velvet cloth 10 can reduce the friction between the moving iron core 11 and the fixed iron core 5.

[0042] In addition, in order to prevent the Teflon cloth 10 from falling off, a protruding chamfer is provided at the end of the moving iron core 10. Such a configuration can ensure that the Teflon cloth 10 will not fall off, thereby improving the stability of use.

[0043] The cross section of the notch is V-shaped, and the shape of the notch determines the smoothness of the electromagnetic force and the size of the effective stroke.

[0044] A matching groove with an opening facing downward is opened at the lower part of the moving iron core 11, and the head of the push rod 8 matches with the matching groove. A matching groove is opened on the moving iron core 11, and the push rod 8 matches with the matching groove. Here, the outer diameter of the push rod 8 is set to be equal to the inner diameter of the matching groove, and the cooperation between the two will be more stable and reliable.

[0045] In the present invention, a notch is designed on the outer wall of the fixed iron core 5, that is, the fixed iron core 5 is thinnest at this point, and magnetic resistance can be generated at the thinnest point, so that when the moving iron core 11 passes through the fixed iron core 5, the moving iron core 11 moves in the direction in which the magnetic circuit tends to be closed, and at this time the moving iron core 11 moves downward; due to the existence of the notch, the magnetic flux passing through the moving iron core 11 does not change much in the stroke, and the electromagnetic force will have a smooth stroke in the entire stroke before being attracted, and this stroke is the effective stroke of the electromagnet.

[0046] Embodiment 2:

[0047] See also Figure 5 A first bearing 9 is installed in the middle of the fixed iron core 5 , the push rod 8 cooperates with the first bearing 9 , and a second bearing 13 is installed at the end of the moving iron core 11 .

[0048] Compared with Example 1, the present embodiment omits the Teflon cloth 10, and adds a first bearing 9 and a second bearing 13. The purpose of providing the first bearing 9 and the second bearing 13 is the same as that of the Teflon cloth 10, which serves to reduce resistance and improve the guiding effect.

[0049] Of course, in addition to the two technical solutions of Teflon velvet 10 and the first bearing 9 and the second bearing 13, a layer of molybdenum disulfide can also be coated on the outer surface of the fixed iron core 5 to reduce friction and effectively reduce the noise generated during use. Compared with the existing technology, it has a wide range of promotion and application value.

[0050] Other technologies for reducing friction may also be used, such as increasing the smoothness of the surface of the fixed iron core 5, which may also reduce friction and thus reduce noise.

[0051] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A touch vibration feedback electromagnet structure applied to a car decorative panel, comprising a housing (4), characterized in that: The outer shell (4) is of a barrel structure and has a round hole at the bottom. A coil frame (2) is placed in the outer shell (4). A copper wire (3) is arranged on the coil frame (2). The copper wire (3) is connected to a wiring harness plug (12) through an electric wire. A fixed iron core (5) is arranged in the middle of the coil frame (2). The fixed iron core (5) is of an inverted convex structure and the middle of the fixed iron core (5) is in a through hole state. The upper part of the fixed iron core (5) is located in the middle of the coil frame (2), and the fixed iron core (5) cooperates with the lower annular raised baffle of the outer shell (4). A push rod (8) passes through the middle of the fixed iron core (5), and a spring (6) is sleeved on the outside of the push rod (8). The top of the push rod (8) is cooperatively connected with a moving iron core (11). A cover plate (1) is installed on the upper side of the housing (4); The cross section of the coil frame (2) is in an I-shape, the copper wire (3) is mounted on the side wall of the coil frame (2), and a through hole is provided in the middle of the coil frame (2); A notch is provided on the outer side wall of the fixed iron core (5).

2. The touch vibration feedback electromagnet structure applied to automobile decorative panels according to claim 1, characterized in that: The cross section of the notch is V-shaped.

3. The touch vibration feedback electromagnet structure applied to automobile decorative panels according to claim 1, characterized in that: A matching groove with an opening facing downward is provided at the lower part of the moving iron core (11), and the head of the push rod (8) matches with the matching groove.

4. The touch vibration feedback electromagnet structure applied to automobile decorative panels according to claim 3, characterized in that: A first bearing (9) is installed in the middle of the fixed iron core (5), and the push rod (8) matches the first bearing (9).

5. The touch vibration feedback electromagnet structure applied to automobile decorative panels according to claim 4, characterized in that: A second bearing (13) is installed at the end of the moving iron core (11).

6. The touch vibration feedback electromagnet structure applied to automobile decorative panels according to claim 1, characterized in that: The bottom end of the push rod (8) is connected with a rubber cap (7).

7. The touch vibration feedback electromagnet structure applied to automobile decorative panels according to claim 1, characterized in that: It also includes a Teflon fleece (10), wherein the Teflon fleece (10) is wrapped around the outer cylindrical surface of the moving iron core (11).

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