Silent stand

Abstract

The application provides a mute support, which comprises a shell, two clamping arms arranged symmetrically left and right, a bottom support and an eccentric transmission device, the eccentric transmission device comprises a cam disc which is sleeved on a rotating shaft, the cam disc is eccentrically connected with the bottom support and the two clamping arms, the cam disc comprises a cam which is arranged at the geometric center of the cam disc, the cam comprises a first rotary curved surface which is arranged at the end of the cam and a protrusion which is perpendicular to the first rotary curved surface, the shell comprises a second rotary curved surface which is suitable for matching the first rotary curved surface and a groove which is arranged perpendicularly to the second rotary curved surface, the protrusion and the groove are engaged to lock the cam disc, so that the bottom support is kept at an initial position, the bottom support is suitable for extending downward from the initial position under the driving of the gravity of an electronic product, and the clamping arms are driven to shrink relative to the shell and clamp the electronic product by the eccentric transmission device. The application avoids the sound caused by vibration of each component when the bottom support is at the initial position by locking the eccentric transmission device.

Description

Technical Field

[0001] The invention belongs to the technical field of brackets, and in particular relates to a silent bracket. Background Art

[0002] The existing Chinese patent application number 202021436889.5 discloses a silent clamping device for electronic products, comprising a shell detachably connected to a preset position, a support assembly provided on the shell, a clamping assembly provided on the shell, and an elastic clamping mechanism; the support assembly is linked to the clamping assembly to cause the clamping mechanism to clamp the electronic product to be clamped when the support assembly moves downward; the elastic clamping mechanism is in elastic contact with the side of the clamping assembly to reduce the gap between the clamping assembly and the clamping assembly. In the prior art such as the above-mentioned scheme, only the elastic clamping mechanism is provided to elastically contact the side of the clamping assembly, and there is no direct fixation of the support assembly. There is still a gap between the support assembly and the shell that vibrates and emits noise. Summary of the Invention

[0003] In view of the above-mentioned defects of the prior art, the object of the present invention is to provide a silent bracket to meet the needs of users.

[0004] To achieve the above-mentioned object, the present invention provides a silent bracket suitable for supporting and fixing electronic products, comprising a housing, two symmetrically arranged clamping arms, a base and an eccentric transmission device, wherein the housing comprises a front shell and a back shell that are mated together, and the eccentric transmission device comprises a cam plate centrally sleeved on a rotating shaft, the cam plate comprising a first plate surface and a second plate surface that are oppositely arranged, the first plate surface being eccentrically connected to the base, and the second plate surface being eccentrically connected to the two clamping arms.

[0005] The cam disc includes a cam arranged at its geometric center, the cam includes a first rotational curved surface arranged at its end and a protrusion perpendicular to the first rotational curved surface, the housing includes a second rotational curved surface suitable for matching the first rotational curved surface and a groove arranged perpendicular to the second rotational curved surface, the protrusion engages with the groove to lock the cam disc, so that the base remains in the initial position.

[0006] The base is adapted to extend downward from an initial position under the drive of the gravity of the electronic product, and simultaneously drive the clamping arm to contract relative to the housing and clamp the electronic product through the eccentric transmission device;

[0007] The clamping arm includes an arm body, the surface shell includes a first guide groove suitable for guiding the extension and contraction direction of the arm body, the arm body includes a limit groove, the limit groove has an open end and a closed end, the first guide groove includes a limit dam suitable for slidingly fitting the limit groove, and the rotating shaft is arranged in the middle of the limit dam;

[0008] The base includes a first telescopic arm, a second telescopic arm, and a supporting portion arranged from top to bottom, the second telescopic arm includes a reset groove arranged along its longitudinal direction, and the back shell includes a stop column extending into the reset groove and slidingly cooperating with the reset groove;

[0009] The reset groove includes an extrusion end face and a first stop end face that are relatively arranged, and the stop column includes a pressure-bearing end face and a second stop end face. A reset spring is abutted between the extrusion end face and the pressure-bearing end face, and the reset spring is suitable for driving the base to contract until the first stop end face abuts against the second stop end face.

[0010] Preferably, the first disk surface and the second disk surface are respectively arranged facing the back shell and the front shell, the cam is arranged on the first disk surface, the back shell includes a sleeve suitable for supporting the cam, the sleeve includes a rotary groove suitable for rotation of the cam, and the rotary groove includes a rotary groove bottom suitable for forming the second rotary curved surface and the groove.

[0011] Preferably, the first disc surface includes a first pin, the base includes a first transmission groove arranged perpendicular to the extension direction thereof, and the first pin slides back and forth in the first transmission groove to achieve an eccentric transmission connection between the cam disc and the clamping arm;

[0012] The second disk surface includes a second transmission groove arranged along its radial direction, and the two second transmission grooves are symmetrically arranged about the rotating axis. The clamping arm includes a second pin shaft, and the second pin shaft slides back and forth in the second transmission groove to realize an eccentric transmission connection between the cam disk and the clamping arm.

[0013] Preferably, the arm body is suitable for assembling the second pin shaft, the first guide groove includes two first guide groove walls, a first guide groove bottom and a first guide groove opening, the first guide groove wall is suitable for slidingly fitting the arm body, the first guide groove bottom includes a first supporting rib, the first guide groove opening includes a limiting buckle, the first supporting rib and the limiting buckle constitute a limiting fit for the arm body to reduce its vibration.

[0014] Preferably, the limiting dam is adapted to abut against the closed end of the limiting groove to limit its further contraction.

[0015] Preferably, the arm body includes a long arm, a short arm and the limiting groove formed therebetween, the first pin shaft is arranged on the long arm, the limiting dam is suitable for separating the first guide groove into two sub-guide grooves, and the sub-guide grooves are suitable for slidingly fitting the long arm of one clamping arm and the short arm of the other clamping arm.

[0016] Preferably, the upper end portion of the first telescopic arm includes a horizontally arranged first transmission groove, and the cam is provided with an avoidance groove for the first telescopic arm to pass through.

[0017] Preferably, the first telescopic arm includes a first guide surface and a first stop surface suitable for forming an L-shape, and the back shell is convexly provided with a second guide surface and a second stop surface suitable for forming an L-shape, the first guide surface and the second guide surface slide together to guide the movement of the first telescopic arm, and the first stop surface abuts the second stop surface to limit further upward movement of the first telescopic arm.

[0018] Preferably, a transition slope is provided between the first telescopic arm and the second telescopic arm, the back shell is provided with a plurality of second supporting ribs, and the upper ends of the second supporting ribs are formed with matching slopes, which are adapted to abut against the transition slope to limit further downward movement of the first telescopic arm.

[0019] The face shell includes a second guide groove suitable for guiding the sliding direction of the second telescopic arm, the second guide groove includes two second guide groove walls suitable for slidingly fitting the second telescopic arm, the second guide groove has a third supporting rib built in, the second supporting rib and the third supporting rib form a limiting fit for the second telescopic arm to reduce its vibration.

[0020] The beneficial effects of the present invention are:

[0021] (1) By providing a cam with a protrusion, the housing is adapted to cooperate with the cam and includes a groove, and the protrusion and the groove engage to achieve locking of the eccentric transmission device, with a good fixing effect. When the base is in the initial position, the components are prevented from making noise due to vibration.

[0022] (2) The arm body is limited and guided in multiple directions by setting a first guide groove, the second telescopic arm is limited and guided in multiple directions by setting a second guide groove, and the first guide surface and the second guide surface that cooperate with each other are provided to guide the first telescopic arm, so that the clamping arm and the bottom support move smoothly and stably during the telescopic process, with good shock absorption effect and good quiet effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of a silent bracket provided by the present invention.

[0024] FIG2 is an exploded schematic diagram of a silent bracket provided by the present invention.

[0025] FIG3 is a schematic diagram of the interior of the housing provided by the present invention.

[0026] FIG4 is a schematic structural diagram of the face shell provided by the present invention.

[0027] FIG5 is a schematic structural diagram of the back shell provided by the present invention.

[0028] FIG6 is a schematic structural diagram of the cam disc provided by the present invention.

[0029] FIG7 is a schematic structural diagram of the clamping arm provided by the present invention.

[0030] In the figure, the clamping arm 101, the bottom bracket 102, the surface shell 103, the back shell 104, the rotating shaft 105, the cam plate 106, the first disk surface 107, the second disk surface 108, the cam 109, the first rotational curved surface 110, the protrusion 111, the sleeve 112, the rotation groove 113, the second rotational curved surface 114, the groove 115, the first telescopic arm 116, the second telescopic arm 117, the supporting portion 118, the first transmission groove 119, the avoidance groove 120, the first pin 121, the second pin 122, the arm body 123, the second transmission groove 124, the first guide groove 125, and the limit dam 126, first supporting rib 127, limiting buckle 128, sub-guide groove 129, long arm 130, short arm 131, limiting groove 132, first guide surface 133, first stop surface 134, second guide surface 135, second stop surface 136, transition inclined surface 137, second supporting rib 138, matching inclined surface 139, second guide groove 140, third supporting rib 141, reset groove 142, stop column 143, extrusion end surface 144, first stop end surface 145, pressure-bearing end surface 146, second stop end surface 147, reset spring 148, elastic shock-absorbing layer 149. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0033] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0034] like Figure 1-7The present invention relates to a silent bracket suitable for supporting and fixing electronic products, comprising a shell, two clamping arms 101 symmetrically arranged on the left and right, a bottom bracket 102 and an eccentric transmission device, wherein the shell comprises a face shell 103 and a back shell 104 that are docked together, the surface of the face shell 103 is covered with an elastic shock-absorbing layer 149, the eccentric transmission device comprises a cam disc 106 centrally sleeved on a rotating shaft 105, the cam disc 106 comprises a first disc surface 107 and a second disc surface 108 that are arranged opposite to each other, the first disc surface 107 and the second disc surface 108 are arranged facing the back shell 104 and the face shell 103 respectively, the first disc surface 107 is connected to the bottom bracket eccentrically, the second disc surface 108 is connected to the two clamping arms 101 eccentrically, the cam disc 106 also comprises a first disc surface 107 and a second disc surface 108 that are arranged opposite to each other 07, the cam 109 includes a first rotational curved surface 110 disposed at its end and a protrusion 111 perpendicular to the first rotational curved surface 110. The back shell 104 includes a sleeve 112 suitable for supporting the cam 109. The sleeve 112 includes a rotational groove 113 suitable for allowing the cam 109 to rotate. The rotational groove 113 includes a rotational groove bottom suitable for forming a second rotational curved surface 114 and a groove 115. The protrusion 111 engages with the groove 115 to lock the cam disc 106, so that the base 102 remains in the initial position. The base 102 is suitable for extending downward from the initial position under the drive of the gravity of the electronic product, while the eccentric transmission device drives the clamping arm 101 to retract relative to the housing and clamp the electronic product. Furthermore, lubricating oil is poured between the various components of the eccentric transmission device.

[0035] In this embodiment, the base 102 includes a first telescopic arm 116, a second telescopic arm 117, and a supporting portion 118, which are arranged from top to bottom. The upper end of the first telescopic arm 116 includes a horizontally arranged first transmission groove 119, and the cam 109 is provided with an escape groove 120 for the first telescopic arm 116 to pass through. The first disk 107 includes a first pin 121, which slides back and forth in the first transmission groove 119 to achieve an eccentric transmission connection between the base 102 and the clamping arm 101. The clamping arm 101 includes an arm body 123 suitable for assembling a second pin 122. The second disk 108 includes a second transmission groove 124 arranged along its radial direction. The two second transmission grooves 124 are symmetrically arranged about the rotating shaft 105. The second pin 122 slides back and forth in the second transmission groove 124 to achieve an eccentric transmission connection between the cam disk 106 and the clamping arm 101.

[0036] In this embodiment, the housing 103 includes a first guide groove 125 adapted to guide the extension and retraction direction of the arm body 123. The first guide groove 125 includes two first guide groove walls adapted to slideably fit the arm body 123, a first guide groove bottom, a first guide groove opening, and a limiting dam 126. The first guide groove bottom includes a first support rib 127, and the first guide groove opening includes a limiting buckle 128. The first support rib 127 and the limiting buckle 128 form a limiting fit for the arm body 123 to reduce its vibration. The limiting dam 126 is adapted to separate the first guide groove 125 into two sub-guide grooves 129, and the rotating shaft 105 is disposed in the middle of the limiting dam 126. The arm body 123 includes a long arm 130, a short arm 131, and a limiting groove 132 formed therebetween. The second pin 122 is disposed on the long arm 130, and the sub-guide groove 129 is adapted to slideably fit the long arm 130 of one clamping arm 101 and the short arm 131 of the other clamping arm 101. The limiting groove 132 is slidably matched with the limiting dam 126 and has an open end and a closed end. The limiting dam 126 is adapted to abut against the closed end of the limiting groove 132 to limit its further contraction.

[0037] In this embodiment, the first telescopic arm 116 includes a first guide surface 133 and a first stop surface 134 adapted to form an L-shape. The back shell 104 is provided with a second guide surface 135 and a second stop surface 136 adapted to form an L-shape. The first guide surface 133 and the second guide surface 135 slidably cooperate to guide the movement of the first telescopic arm 116. The first stop surface 134 abuts the second stop surface 136 to limit further upward movement of the first telescopic arm 116. A transition slope 137 is provided between the first telescopic arm 116 and the second telescopic arm 117. The back shell 104 is provided with a plurality of second support ribs 138. The upper ends of the second support ribs 138 are formed with mating slopes 139. The mating slopes 139 are adapted to abut the transition slopes 137 to limit further downward movement of the first telescopic arm 116.

[0038] In this embodiment, the face shell includes a second guide groove 140 suitable for guiding the sliding direction of the second telescopic arm 117. The second guide groove 140 includes two second guide groove walls suitable for slidingly fitting the second telescopic arm 117. The second guide groove 140 has a third support rib 141 built into it. The second support rib 138 and the third support rib 141 constitute a limiting fit for the second telescopic arm 117 to reduce its vibration.

[0039] In the embodiment, the second telescopic arm 117 comprises a reset slot 142 arranged along the longitudinal direction thereof, the back shell 104 comprises a stop column 143 extending into the reset slot 142 and reciprocally slidingly fitted with the reset slot 142, the reset slot 142 comprises a pressing end face 144 and a first stop end face 145 arranged oppositely, the stop column 143 comprises a bearing end face 146 and a second stop end face 147, the reset spring 148 is abutted between the pressing end face 144 and the bearing end face 146, and the reset spring 148 is adapted to drive the bottom support 102 to contract until the first stop end face 145 and the second stop end face 147 are abutted.

[0040] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A silent bracket suitable for supporting and fixing electronic products, characterized in that: The invention comprises a housing, two clamping arms symmetrically arranged on the left and right, a bottom support and an eccentric transmission device, wherein the housing comprises a front shell and a back shell that are mated with each other, the eccentric transmission device comprises a cam plate centrally sleeved on a rotating shaft, the cam plate comprises a first plate surface and a second plate surface that are arranged opposite to each other, the first plate surface is eccentrically connected to the bottom support, and the second plate surface is eccentrically connected to the two clamping arms. The cam disc includes a cam arranged at its geometric center, the cam includes a first rotational curved surface arranged at its end and a protrusion perpendicular to the first rotational curved surface, the housing includes a second rotational curved surface suitable for matching the first rotational curved surface and a groove arranged perpendicular to the second rotational curved surface, the protrusion engages with the groove to achieve locking of the cam disc, so that the base remains in the initial position. The base is adapted to extend downward from an initial position under the drive of the gravity of the electronic product, and simultaneously drive the clamping arm to contract relative to the housing and clamp the electronic product through the eccentric transmission device; The clamping arm includes an arm body, the surface shell includes a first guide groove suitable for guiding the extension and contraction direction of the arm body, the arm body includes a limit groove, the limit groove has an open end and a closed end, the first guide groove includes a limit dam suitable for slidingly fitting the limit groove, and the rotating shaft is arranged in the middle of the limit dam; The base includes a first telescopic arm, a second telescopic arm, and a supporting portion arranged from top to bottom, the second telescopic arm includes a reset groove arranged along its longitudinal direction, and the back shell includes a stop column extending into the reset groove and slidingly cooperating with the reset groove; The reset groove includes an extrusion end face and a first stop end face that are relatively arranged, and the stop column includes a pressure-bearing end face and a second stop end face. A reset spring is abutted between the extrusion end face and the pressure-bearing end face, and the reset spring is suitable for driving the base to contract until the first stop end face abuts against the second stop end face.

2. A silent bracket according to claim 1, characterized in that: The first disk surface and the second disk surface are respectively arranged to face the back shell and the front shell, the cam is arranged on the first disk surface, the back shell includes a sleeve suitable for supporting the cam, the sleeve includes a rotary groove suitable for the cam to rotate, and the rotary groove includes a rotary groove bottom suitable for forming the second rotary curved surface and the groove.

3. A silent bracket according to claim 2, characterized in that: The first disc surface includes a first pin shaft, and the base includes a first transmission groove arranged perpendicular to the extension direction thereof, and the first pin shaft slides back and forth in the first transmission groove to realize an eccentric transmission connection between the cam disc and the clamping arm; The second disk surface includes a second transmission groove arranged along its radial direction, and the two second transmission grooves are symmetrically arranged about the rotating axis. The clamping arm includes a second pin shaft, and the second pin shaft slides back and forth in the second transmission groove to realize an eccentric transmission connection between the cam disk and the clamping arm.

4. A silent bracket according to claim 3, characterized in that: The arm body is suitable for assembling the second pin shaft, the first guide groove includes two first guide groove walls, a first guide groove bottom and a first guide groove opening, the first guide groove wall is suitable for slidingly fitting the arm body, the first guide groove bottom includes a first supporting rib, the first guide groove opening includes a limiting buckle, the first supporting rib and the limiting buckle constitute a limiting fit for the arm body to reduce its vibration.

5. The silent bracket according to claim 4, characterized in that: The limiting dam is adapted to abut against the closed end of the limiting groove to limit further contraction thereof.

6. The silent bracket according to claim 5, characterized in that: The arm body includes a long arm, a short arm and the limiting groove formed therebetween. The first pin shaft is arranged on the long arm. The limiting dam is suitable for separating the first guide groove into two sub-guide grooves. The sub-guide grooves are suitable for slidingly fitting the long arm of one clamping arm and the short arm of the other clamping arm.

7. The silent bracket according to claim 3, characterized in that: The upper end portion of the first telescopic arm includes a horizontally arranged first transmission groove, and the cam is provided with an avoidance groove for the first telescopic arm to move through.

8. The silent bracket according to claim 7, characterized in that: The first telescopic arm includes a first guide surface and a first stop surface suitable for forming an L-shape, and the back shell is convexly provided with a second guide surface and a second stop surface suitable for forming an L-shape. The first guide surface and the second guide surface slide together to guide the movement of the first telescopic arm, and the first stop surface abuts the second stop surface to limit further upward movement of the first telescopic arm.

9. The silent bracket according to claim 8, characterized in that: A transition slope is provided between the first telescopic arm and the second telescopic arm. The back shell is provided with a plurality of second supporting ribs. The upper ends of the second supporting ribs are provided with matching slopes. The matching slopes are adapted to abut against the transition slopes to limit further downward movement of the first telescopic arm. The face shell includes a second guide groove suitable for guiding the sliding direction of the second telescopic arm, the second guide groove includes two second guide groove walls suitable for slidingly fitting the second telescopic arm, the second guide groove has a third supporting rib built in, the second supporting rib and the third supporting rib form a limiting fit for the second telescopic arm to reduce its vibration.

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