A slip ring

Abstract

The utility model discloses a slip ring, it includes: support, rotor, can rotate relative to the support, be equipped with the electric ring on the rotor, brush silk, and the electric ring contact conduction, flexible circuit board, be located on the support, wherein, the flexible circuit board has the bending part, the first end part of brush silk is fixed on the bending part, the second end part of brush silk and the contact point on the electric ring contact, the bending part is configured as make brush silk deviate the diameter direction of electric ring's through the contact point, to make the second end part of brush silk obliquely lap in the contact point of electric ring. This slip ring does not need to bend brush silk, and circuit connection reliability is higher.

Description

Technical Field

[0001] This utility model relates to a slip ring, and more particularly to a conductive slip ring for household appliances (such as hair dryers). Background Technology

[0002] A slip ring is an electrical component that conducts energy or signals to a rotating body; typically, it is an electric slip ring. A slip ring mainly consists of two parts: a rotating part, called the "rotor," which connects to the shaft of the equipment and rotates with it; and a stationary part, called the "stator," which connects to the fixed part of the equipment. The stator typically includes conductive brush filaments, one end of which is fixed to a circuit board, and the other end abuts against the rotor and slides in contact with the rotor's conductive rings to form a circuit. However, the conductive brush filaments usually need to be bent at one end and soldered to the circuit board to secure them. This assembly process is cumbersome, the bending process is difficult to control, and it can lead to poor electrical contact.

[0003] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a slip ring that does not require bending of brush bristles and has high reliability of circuit connection.

[0005] One aspect of this utility model provides a slip ring, comprising:

[0006] support;

[0007] A rotor that is rotatable relative to the support, and a conductive ring is provided on the rotor;

[0008] The brush bristles are in contact with the conductive ring and are electrically connected.

[0009] A flexible circuit board is disposed on the support;

[0010] The flexible circuit board has a bending portion, the first end of the brush bristles is fixed to the bending portion, and the second end of the brush bristles contacts a contact point on the conductive ring. The bending portion is configured to deviate the brush bristles from a diametrical direction passing through the contact point of the conductive ring, so that the second end of the brush bristles obliquely overlaps the contact point of the conductive ring.

[0011] In a preferred embodiment, the bristles extend along an oblique line that intersects the diametrical direction.

[0012] In a more preferred embodiment, the angle between the oblique line and the diameter direction is greater than 90 degrees and less than 180 degrees.

[0013] In a preferred embodiment, the bracket is provided with a mounting groove, the mounting groove having a bottom wall and an inclined wall, the inclined wall being inclined relative to the bottom wall, the flexible circuit board being disposed in the mounting groove, and the bent portion being located at the inclined wall.

[0014] In a more preferred embodiment, the slip ring further includes a pressure plate that presses the flexible circuit board into the mounting groove, the pressure plate being configured to form the bent portion under the action of the inclined wall or to maintain the bent portion in a preset bent shape.

[0015] In a more preferred embodiment, the inclined wall has an inclined through hole, through which the brush bristles pass.

[0016] In a more preferred embodiment, inclined walls are provided on opposite sides of the bottom wall, and the inclined walls on both sides are spaced apart along the circumferential direction of the conductive ring, and the two bent portions of the flexible circuit board are located at the corresponding inclined walls.

[0017] In a further preferred embodiment, the slip ring includes multiple sets of brush bristles, each set of brush bristles including multiple brush bristles arranged side by side; several sets of brush bristles are welded to each of the bending portions, and multiple conductive rings are provided on the rotor, the multiple conductive rings being spaced apart along the axial direction of the rotor, and each set of brush bristles and a corresponding conductive ring are in contact and connected.

[0018] In a preferred embodiment, the rotor is rotatably disposed on the inner side of the bracket, the flexible circuit board is fixed on the outer side of the bracket, and the slip ring further includes a pressure plate that presses the flexible circuit board onto the bracket to form or maintain the bent portion.

[0019] In a preferred embodiment, the slip ring further includes a housing, the bracket is disposed within the housing, the rotor is rotatably disposed within the bracket, and a sealing ring is provided between the bracket and the housing.

[0020] This utility model has the following advantages:

[0021] The slip ring of this invention uses a flexible circuit board with a bending section. The brush bristles are placed on the bending section of the flexible circuit board. By configuring the tilt angle of the bending section, the brush bristles can be tilted and overlapped on the conductive ring, which reduces the stress at the connection between the brush bristles and the flexible circuit board, and achieves a reliable circuit connection without bending the brush bristles. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of a slip ring according to an embodiment of the present utility model.

[0024] Figure 2 This is an exploded view of a slip ring according to an embodiment of the present invention.

[0025] Figure 3 A bracket, flexible circuit board, and pressure plate according to an embodiment of the present invention are shown.

[0026] Figure 4 This is a front view of a slip ring according to an embodiment of the present invention.

[0027] Figure 5 for Figure 4 Sectional view along the AA direction.

[0028] Figure 6 This is a side view of a slip ring according to an embodiment of the present invention.

[0029] Figure 7 for Figure 6 Sectional view along the BB direction.

[0030] in:

[0031] 1. Bracket; 11. Mounting slot; 111. Bottom wall; 112. Inclined wall; 113. Through hole;

[0032] 2. Rotor; 21. Conductive ring; 22. Cable;

[0033] 3. Brush bristles;

[0034] 4. Flexible circuit board; 41. Bending section;

[0035] 5. Pressure plate;

[0036] 6. Outer shell; 61. Sealing ring. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof.

[0038] In this document, the terms “upper,” “lower,” “front,” “rear,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Figures 1 to 7 The diagrams are drawn to scale. To keep the instructions concise, the proportions of each component are not listed individually. However, the proportions and positions of each component should be considered part of the contents of this instruction manual.

[0040] Figures 1 to 7 An embodiment of a slip ring is shown. This slip ring is used to establish a power supply circuit between an electrical device (such as a household appliance) and a power source. For example, the slip ring can be applied to the power cord of a hair dryer, allowing the power cord to rotate relative to the hair dryer while supplying power, so that the user can use the hair dryer in any posture, while reducing or avoiding cable twisting.

[0041] Reference Figures 1 to 7 As shown, the slip ring includes a bracket 1, a rotor 2, brush 3, a flexible circuit board 4, a pressure plate 5, and a housing 6.

[0042] The support 1 is a hollow cylindrical shape made of insulating material, such as an injection-molded plastic part. The support 1 can be assembled from multiple components along its circumference for easy molding or assembly. Specifically, in the example shown in the attached drawing, the support 1 is formed by joining two semi-cylindrical sections.

[0043] Rotor 2 is connected to support 1 and can rotate relative to support 1. For example, support 1 is fitted around the outside of rotor 2, and multiple sets of bearings are arranged between them. A conductive ring 21 is provided on the outer circumference of rotor 2, and the conductive ring 21 surrounds rotor 2, and the conductive ring 21 is circular in shape. Figure 2 and Figure 7 As shown, the number of conductive rings 21 can be multiple, depending on the amount of power and / or signal to be transmitted. Multiple conductive rings 21 are spaced apart along the axial direction (centerline direction) of the rotor 2, with adjacent conductive rings 21 isolated from each other. Annular grooves may be formed on the outer circumferential surface of the rotor 2, and the conductive rings 21 are disposed within these grooves. Multiple annular grooves are spaced apart, with adjacent conductive rings 21 separated by the groove walls. The rotor 2 itself is made of insulating material, such as injection-molded plastic.

[0044] The brush bristles 3 are elongated conductors, such as those made of metal wire (copper wire), used to make contact with the conductive rings 21 on the rotor 2. In the example shown in the attached figures, the slip ring includes one or more sets of slip bristles, the number of which corresponds to the number of conductive rings 21. For example, each conductive ring 21 corresponds to a set of brush bristles 3, and a set of brush bristles 3 may include 2 to 10 brush bristles arranged side by side, the length and tilt angle of which are approximately equal, and all of which are in sliding contact with the same conductive ring 21.

[0045] Flexible printed circuit board 4 (FPC) uses a flexible substrate, such as polyimide or polyester film. Also known as a flexible circuit board or flexible circuit board, it can be freely bent and folded. This flexible circuit board 4 is mounted on support 1. (See reference...) Figure 5 The flexible circuit board 4 has a bending portion 41. The first end of the brush bristles 3 is fixed (e.g., welded) to the bending portion 41, and the second end of the brush bristles 3 contacts a contact point P on the conductive ring 21. The bending portion 41 is configured to deviate the brush bristles 3 from a diametrical direction D passing through the contact point P of the conductive ring 21, so that the second end of the brush bristles 3 obliquely overlaps the contact point P of the conductive ring 21. The brush bristles 3 extend along an oblique line L, which intersects the diametrical direction D passing through the center O of the conductive ring 21. Further, the oblique line and the diametrical direction form an angle greater than 90 degrees and less than 180 degrees. This angle is preferably greater than 90 degrees and less than 135 degrees. The rotor 2 is capable of rotating 360 degrees within the support 1. During rotation, the brush bristles 3 slide on the outer circumferential surface of the conductive ring 21 and always have a contact point with the corresponding conductive ring 21.

[0046] Cable 22, used for transmitting power and / or signals, is connected to the flexible circuit board 4. The flexible circuit board 4 also has a circuit layer, and the brush filament 3, cable 22, and corresponding circuit layer are connected to form a conductive circuit with the conductive ring 21. The first end of the brush filament 3 is fixed in the brush filament hole on the bending portion 41 of the flexible circuit board 4. The brush filament 3 is perpendicular to the bending portion 41. The tilt angle of the brush filament 3 is controlled by the bending angle of the bending portion 41, so that the brush filament 3 is tilted and overlapped on the conductive ring 21 at the expected angle. This can reduce the stress at the connection between the brush filament 3 and the flexible circuit board 4, and ensure good contact between the brush filament 3 and the conductive ring 21.

[0047] The flexible circuit board 4 is fixed to the outside of the bracket 1. (Refer to...) Figure 2 The bracket 1 is provided with a mounting groove 11, which has a bottom wall 111 and an inclined wall 112. The inclined wall 112 is inclined relative to the bottom wall 111. The flexible circuit board 4 is disposed in the mounting groove 11, and the bent part 41 is located at the inclined wall 112. Figure 2 , Figure 3 and Figure 7As shown, an inclined through hole 113 is provided on the inclined wall 112, and the brush bristles 3 pass through the through hole 113.

[0048] Inclined walls 112 are provided on opposite sides of the bottom wall 111. The inclined walls 112 on both sides are spaced apart along the circumferential direction of the conductive ring 21. The two bent portions 41 of the flexible circuit board 4 are located at the corresponding inclined walls 112. Specifically, in the example shown in the attached figure, the slip ring includes multiple sets of brush bristles 3. Each bent portion 41 is provided with several sets (1 set, 2 sets or more) of brush bristles 3. Each set of brush bristles 3 on each bent portion 41 is in contact with a corresponding conductive ring 21. The brush bristles 3 on the two bent portions 41 are arranged in pairs, and the paired brush bristles 3 are in contact with the same conductive ring 21.

[0049] The pressure plate 5 presses the flexible circuit board 4 into the mounting groove 11. The pressure plate 5 is configured to form a bent portion 41 under the action of the inclined wall 112 or to maintain the bent portion 41 in a preset bent shape. The bent shape of the bent portion 41 can be determined by the inclined wall 112. Under the pressure of the pressure plate 5, the flexible circuit board 4 is tightly attached to the mounting groove 11. The portion of the flexible circuit board 4 at the inclined wall 112 is bent to form the expected bent portion 41, so that the brush filaments 3, which are vertically arranged on the bent portion 41, extend in the expected inclined direction.

[0050] The outer shell 6 is a hollow cylinder, which is fitted over the support 1 and the pressure plate 5. An annular sealing ring 61 is provided between the support 1 and the outer shell 6 and is deformed by compression to improve the waterproof and dustproof effect. The pressure plate 5 can be fixed to the support 1 or fixed inside the outer shell 6 to maintain the flexible circuit board 4 in a preset shape, especially to maintain the bending angle of the bent part 41, and reduce the stress at the connection between the brush filament 3 and the flexible circuit board 4.

[0051] In the embodiment shown in the attached figure, the slip ring includes two supports 1, each of which is provided with a flexible circuit board 4. Multiple sets of brush bristles 3 of the slip ring are distributed on the two flexible circuit boards 4 to make reasonable use of the internal space of the slip ring and avoid the flexible circuit board 4 from being too large.

[0052] The slip ring in this embodiment uses a flexible circuit board 4 with a bending portion 41. The brush bristles 3 are placed on the bending portion 41 of the flexible circuit board 4. By configuring the tilt angle of the bending portion 41, the brush bristles 3 can be tilted and overlapped on the conductive ring 21, which reduces the stress at the connection between the brush bristles 3 and the flexible circuit board 4, and achieves a reliable circuit connection without bending the brush bristles 3.

[0053] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0054] Those skilled in the art will understand that, unless otherwise stated, the singular forms “a,” “b,” and “the” used herein may also include the plural forms. It will be further understood that “multiple” in this invention refers to two or more, and other quantifiers are similarly understood.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] The above embodiments are only for illustrating the technical concept and features of this utility model, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and should not be construed as limiting the protection scope of this utility model. All equivalent transformations or modifications made based on the principles of this utility model should be covered within the protection scope of this utility model.

Claims

1. A slip ring, characterized in that, include: support; A rotor that is rotatable relative to the support, and a conductive ring is provided on the rotor; The brush bristles are in contact with the conductive ring and are electrically connected. A flexible circuit board is disposed on the support; The flexible circuit board has a bending portion, the first end of the brush bristles is fixed to the bending portion, and the second end of the brush bristles contacts a contact point on the conductive ring. The bending portion is configured to deviate the brush bristles from a diametrical direction passing through the contact point of the conductive ring, so that the second end of the brush bristles obliquely overlaps the contact point of the conductive ring.

2. The slip ring according to claim 1, characterized in that, The bristles extend along an oblique line that intersects the diametrical direction.

3. The slip ring according to claim 2, characterized in that, The angle between the diagonal line and the diameter direction is greater than 90 degrees and less than 180 degrees.

4. The slip ring according to claim 1, characterized in that, The bracket is provided with a mounting groove, which has a bottom wall and an inclined wall. The inclined wall is inclined relative to the bottom wall. The flexible circuit board is disposed in the mounting groove, and the bent part is located at the inclined wall.

5. The slip ring according to claim 4, characterized in that, The slip ring also includes a pressure plate that presses the flexible circuit board into the mounting groove. The pressure plate is configured to form the bent portion or maintain the bent portion in a preset bent shape under the action of the inclined wall.

6. The slip ring according to claim 4, characterized in that, An inclined through hole is provided on the inclined wall, and the brush bristles pass through the through hole.

7. The slip ring according to claim 4, characterized in that, Inclined walls are provided on opposite sides of the bottom wall, and the inclined walls on both sides are spaced apart along the circumferential direction of the conductive ring. The two bent portions of the flexible circuit board are located at the corresponding inclined walls.

8. The slip ring according to claim 7, characterized in that, The slip ring includes multiple sets of brush bristles, each set of brush bristles including multiple brush bristles arranged side by side; several sets of brush bristles are welded on each of the bending portions; multiple conductive rings are provided on the rotor, the multiple conductive rings are spaced apart along the axial direction of the rotor, and each set of brush bristles is in contact with a corresponding conductive ring for conduction.

9. The slip ring according to claim 1, characterized in that, The rotor is rotatably disposed on the inner side of the bracket, the flexible circuit board is fixed on the outer side of the bracket, and the slip ring further includes a pressure plate, which presses the flexible circuit board onto the bracket to form or maintain the bent portion.

10. The slip ring according to claim 1, characterized in that, The slip ring also includes a housing, the bracket is disposed inside the housing, the rotor is rotatably disposed inside the bracket, and a sealing ring is disposed between the bracket and the housing.

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