Anti-loosening folding structure and table lamp

Abstract

The anti-loosening folding structure comprises a folding support, the folding support comprises a first rotating arm and a second rotating arm, one end of the first rotating arm is provided with a protruding rotating shaft, one end of the second rotating arm is provided with a connecting cylinder, and the rotating shaft extends into the connecting cylinder and can rotate relative to the connecting cylinder. A shaft sleeve is rotationally sleeved with the connecting cylinder, clamping teeth are arranged on the end face, close to the rotating shaft, of the shaft sleeve, clamping grooves matched with the clamping teeth are formed in the outer end face of the rotating shaft, a fastener with a threaded section is arranged in the connecting cylinder, a nut groove is formed in the first rotating arm, a nut matched with the nut groove is arranged in the nut groove, and the outer contour of the nut is of a non-circular structure. The fastener penetrates through the shaft sleeve, extends into the first rotating arm along the axis of the rotating shaft and is matched with the threaded section through a nut so as to fix the clamping teeth in the clamping groove. Compared with the prior art, the utility model has the advantage that no matter whether the first rotating arm and the second rotating arm rotate forwards or reversely, the fastener cannot loosen.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of desk lamp with anti-loose structure especially anti-loose folding structure. BACKGROUND

[0002] Desk lamp is essential in the process of work and study, especially the learning task of high school students is very heavy, and desk lamp needs to be used to illuminate at night, and most of the traditional desk lamps cannot be folded, occupy large space, have high packaging and transportation cost and are inconvenient to carry. To solve this problem, some desk lamps with folding function appear in the market, which realize the folding function of the desk lamp by setting the support of the desk lamp as a folding support.

[0003] For example, the Chinese utility model patent with the patent announcement number CN209283297U "a desk lamp type mobile phone scanning support" includes a base, a foldable support and a mobile phone clamp; the foldable support includes a hinged first bending part and a second bending part, the bottom end of the first bending part is rotationally connected with the base, and the upper end of the second bending part is rotationally connected with the mobile phone clamp; the lower end of the first bending part and the base, the first bending part and the second bending part, and the second bending part and the bottom horizontal column are connected and fixed by screws that are reversely tightened on both sides.

[0004] In the above-mentioned scheme, the desk lamp type support can be unfolded and folded by reversely tightening the screws. However, this desk lamp type support can only be reversely rotated to prevent loosening, and when it is forwardly rotated, the screws will loosen, which will cause the support to be unable to be fixed at a certain angle at will. UTILITY MODEL CONTENTS

[0005] The utility model solves the problem that the screws will loosen when the folding support of the desk lamp is forwardly rotated, and the technical problem to be solved by the utility model is to provide an anti-loose folding structure and a desk lamp to solve the above-mentioned problems.

[0006] The utility model adopts the technical scheme that: including folding support, the folding support includes first rotating arm and second rotating arm, one end of first rotating arm has the rotating shaft of external convex, one end of second rotating arm has the connecting barrel, the rotating shaft extends into the connecting barrel and can rotate relative to the connecting barrel, the shaft sleeve is rotationally arranged in the connecting barrel, the end face of the shaft sleeve close to the rotating shaft has the tooth, the outer end face of the rotating shaft has the card slot matched with the tooth, the connecting barrel is equipped with the fastener with the thread segment, the first rotating arm is equipped with the nut groove, the nut groove is equipped with the nut matched with it and the outer contour is non-circular structure, the fastener passes through the shaft sleeve and extends into the first rotating arm along the rotating shaft axis and is matched with the thread segment through the nut to fix the tooth in the card slot.

[0007] The further preferred scheme of the utility model is that the clamping teeth are uniformly distributed along the edge of the end face of the shaft sleeve, the number of the clamping grooves corresponds to the number of the clamping teeth, and the clamping grooves are uniformly distributed along the edge of the outer end face of the rotating shaft.

[0008] The further preferred scheme of the utility model is that the shaft sleeve is provided with a blocking ring at the end away from the clamping teeth, the connecting cylinder is provided with a limiting baffle for limiting the sliding of the shaft sleeve along the direction of the rotating shaft, the limiting baffle is provided with a through hole for the shaft sleeve to pass through, and the blocking ring is attached to the side of the limiting baffle away from the rotating shaft when the clamping teeth are pressed in the clamping grooves and engaged with the clamping grooves.

[0009] The further preferred scheme of the utility model is that the fastener is a half tooth screw, and the blocking ring is located between the limiting baffle and the screw cap.

[0010] The further preferred scheme of the utility model is that the screw column of the half tooth screw is in interference fit with the shaft sleeve.

[0011] The further preferred scheme of the utility model is that the threaded section is arranged on the screw column in the first rotating arm.

[0012] The further preferred scheme of the utility model is that the first rotating arm is provided with an installation channel penetrating through the first rotating arm and the rotating shaft in line with the axis of the rotating shaft, the nut groove is located in the installation channel, and the nut groove is provided with an installation hole for the fastening bolt to pass through.

[0013] The further preferred scheme of the utility model is that the nut groove is a hexagonal nut groove, and the nut is a hexagonal nut.

[0014] The further preferred scheme of the utility model is that the side of the installation channel away from the rotating shaft and the side of the connecting cylinder away from the rotating shaft are both provided with an outer cover for sealing the installation channel and the connecting cylinder respectively.

[0015] A table lamp comprises a lampshade and a lamp holder, the lampshade is fixed on the first rotating arm of the anti-loosening folding structure, and the lamp holder is rotationally connected to the second rotating arm of the anti-loosening folding structure.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The clamping teeth are arranged on the end face of the shaft sleeve, the clamping grooves are arranged on the outer end face of the rotating shaft, the fastener is arranged in the connecting cylinder and matched with the nut in the threaded groove, the fastener passes through the shaft sleeve and extends into the first rotating arm along the axis of the rotating shaft and is matched to fix the clamping teeth in the clamping grooves, when the first rotating arm rotates in the positive or reverse direction, the fastener rotates together with the first rotating shaft under the action of the forces from the nut and the shaft sleeve at both ends of the fastener, and the positive or reverse rotation of the first rotating arm will not cause the loosening of the fastener.

[0018] 2. The fastener only contacts the bushing. The bushing is rotatably connected to the second rotating arm. When the second rotating arm rotates in the forward or reverse direction, the bushing's groove engages with the rotating shaft, so the second rotating arm will not drive the bushing to rotate. The fastener will not loosen due to the interaction between the second rotating arm and the fastener. Therefore, the fastener will not loosen regardless of whether the first or second rotating arm rotates in the forward or reverse direction. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0021] Figure 2 This is a top view of a preferred embodiment of the present invention;

[0022] Figure 3 This is a preferred embodiment of the present utility model. Figure 2 Sectional view at point AA;

[0023] Figure 4 This is a three-dimensional structural diagram of the preferred embodiment of the present invention after disassembling the second rotating arm;

[0024] Figure 5 This is an exploded view of a preferred embodiment of the present invention.

[0025] In the diagram: 1. First rotating arm; 11. Mounting channel; 111. Nut groove; 112. Mounting hole; 13. Rotating shaft; 131. Slot; 2. Second rotating arm; 21. Connecting cylinder; 211. Limiting baffle; 212. Through hole; 3. Bushing; 31. Clamping tooth; 4. Fastener; 41. Threaded section; 42. Retaining ring; 5. Nut; 6. Outer cover; 7. Rotating shaft. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that like numerals refer to like items throughout the appended drawings and that once an item is defined in one drawing, it is not necessarily further defined and explained in subsequent drawings.

[0028] Example 1

[0029] This embodiment mainly describes the anti-loose folding structure and the table lamp, as follows:

[0030] As Figures 1 to 5The anti-loose folding structure is shown, including a folding support, the folding support including a first rotating arm 1 and a second rotating arm 2, the first rotating arm 1 having an outwardly convex rotating shaft 13 on one end of a side wall, the second rotating arm 2 having a connecting cylinder 21 at one end, the connecting cylinder 21 being used for inserting the rotating shaft 13, the rotating shaft 13 extending into the connecting cylinder 21 and being rotatable relative to the connecting cylinder 21 to realize rotation of the first rotating arm 1 relative to the second rotating arm 2, the first rotating arm 1 and the second rotating arm 2 being unfolded and folded by rotating the first rotating arm 1 or the second rotating arm 2, a shaft sleeve 3 being rotatably sleeved in the connecting cylinder 21, the shaft sleeve 3 being made of plastic material, an end surface of the shaft sleeve 3 close to the rotating shaft 13 having a clamping tooth 31, an outer end surface of the rotating shaft 13 having a clamping groove 131 matched with the clamping tooth 31, the connecting cylinder 21 being provided with a fastener 4, the fastener 4 being used for connecting the first rotating arm 1 and the second rotating arm 2, the fastener 4 having a threaded section 41, the first rotating arm 1 having an installation channel 11 collinear with an axis of the rotating shaft 13, the installation channel 11 transversely penetrating the first rotating arm 1 and the rotating shaft 13, the installation channel 11 being provided with a nut groove 111, and the nut groove 111 having an installation hole 112 for a fastening bolt to pass through, the nut groove 111 being provided with a nut 5 matched therewith and having a non-circular structure in an outer contour, such as a triangular nut 5, a quadrangular nut 5, a hexagonal nut 5, and the like, preferably a hexagonal nut 5, the nut groove 111 being a hexagonal nut groove 111. The fastener 4 passes through the shaft sleeve 3 and extends into the first rotating arm 1 along the axis of the rotating shaft 13, the fastener 4 driving the shaft sleeve 3 to slide to engage the clamping tooth 31 with the clamping groove 131 in a sliding process, at this time, the clamping tooth 31 is pressed and fixed in the clamping groove 131 by the nut 5 matched with the threaded section 41. When in use, the clamping tooth 31 on the rotating shaft 13 drives the shaft sleeve 3 to rotate with the rotating shaft 13 when the first rotating arm 1 is rotated forward or reversely, the shaft sleeve 3 generates friction on the fastener 4 in a rotating process to drive the fastener 4 to rotate in a direction of the shaft sleeve 3, at the same time, the nut 5 rotates with the first rotating arm 1 under the action of the nut groove 111 in a rotating process of the first rotating arm 1 to drive the fastener 4 to rotate with the nut 5, in summary, the fastener 4 is driven to rotate with the first rotating shaft 13 by the forces of the nut 5 and the shaft sleeve 3 at two ends of the fastener 4, thus, the first rotating arm 1 is not prone to loosening of the fastener 4 in a rotating process, and the fastener 4 only contacts with the shaft sleeve 3, the shaft sleeve 3 is rotatably connected with the second rotating arm 2, the second rotating arm 2 does not drive the shaft sleeve 3 to rotate when the second rotating arm 2 is rotated forward or reversely because the clamping groove 131 of the shaft sleeve 3 is engaged with the rotating shaft 13, the fastener 4 also does not loosen because of interaction of the second rotating arm 2, thus, the fastener 4 does not loosen whether the first rotating arm 1 and the second rotating arm 2 are rotated forward or reversely.

[0031] As Figure 5The teeth 31 have a plurality of teeth 31 arranged along the edge of the end surface of the shaft sleeve 3, and the number of the teeth 31 corresponds to the number of the tooth grooves 131 arranged along the edge of the outer end surface of the rotating shaft 13. The increase of the number of the teeth 31 and the tooth grooves 131 increases the contact area between the shaft sleeve 3 and the rotating shaft 13, and increases the friction between the shaft sleeve 3 and the rotating shaft 13, thereby enhancing the stability of the structure of the rotating shaft 13 and the shaft sleeve 3, so as to prevent the teeth 31 from being separated from the tooth grooves 131.

[0032] As shown in Figure 3 In order to prevent the shaft sleeve 3 from slipping out of the connecting barrel 21, the end of the shaft sleeve 3 away from the teeth 31 is provided with a blocking ring 42, and the connecting barrel 21 is provided with a limiting baffle 211. The limiting baffle 211 is used to limit the sliding of the shaft sleeve 3 along the direction of the rotating shaft 13. The limiting baffle 211 is provided with a through hole 212 for the shaft sleeve 3 to pass through. Preferably, the diameter of the through hole 212 is smaller than the diameter of the blocking ring 42, and equal to the diameter of the passing part of the shaft sleeve 3. The fastener 4 passes through the shaft sleeve 3 and passes through the through hole 212 together with the shaft sleeve 3. When the fastener 4 is fixedly connected with the nut 5 to connect the first rotating arm 1 and the second rotating arm 2, the teeth 31 are pressed in the tooth grooves 131 and engaged with the tooth grooves 131. At this time, the blocking ring 42 is attached to the side of the limiting baffle 211 away from the rotating shaft 13.

[0033] Specifically, the fastener 4 is a screw. The screw can be a half-thread screw or a full-thread screw, and preferably is a half-thread screw. The threaded section 41 of the half-thread screw is arranged on the screw column located in the first rotating arm 1. The blocking ring 42 is located between the limiting baffle 211 and the screw cap. The shaft sleeve 3 is limited by the limiting baffle 211 and the screw cap to prevent the shaft sleeve 3 from being deviated during the rotation of the first rotating arm 1.

[0034] Specifically, in order to increase the friction between the shaft sleeve 3 and the screw column, the screw column of the screw is in interference fit with the shaft sleeve 3.

[0035] As shown in Figure 1 and Figure 5 In order to beautify the appearance of the first rotating arm 1 and the second rotating arm 2, the side of the mounting channel 11 away from the rotating shaft 13 and the side of the connecting barrel 21 away from the rotating shaft 13 are both provided with an outer cover 6 for sealing the mounting channel 11 and the connecting barrel 21, respectively.

[0036] Specifically, in order to facilitate the installation of a lamp holder, or the installation of other rotating arms to increase the extension height of the rotating structure, the side of the second rotating arm 2 away from the first rotating arm 1 is provided with a rotating shaft 7, the rotating shaft 7 is located away from the rotating shaft 13, the structure of the rotating shaft 7 is the same as that of the rotating shaft 13, and the rotating shaft 7 is used to be connected with the lamp holder or other rotating arms, at this time the structure of the connection between the lamp holder or other rotating arms and the first rotating arm 1 and the second rotating arm 2 is the same.

[0037] Embodiment 2

[0038] This embodiment mainly describes a table lamp, which is specifically as follows:

[0039] A table lamp, comprising a lampshade (not shown in the figure) and a lamp holder (not shown in the figure), the lampshade (not shown in the figure) is fixed on the first rotating arm 1 of the anti-loose folding structure, and the lamp holder (not shown in the figure) is rotatably connected to the second rotating arm 2 of the anti-loose folding structure, the first rotating arm 1 and the second rotating arm 2 are stacked on the lamp holder by rotating the first rotating arm 1 and the second rotating arm 2, the table lamp can be folded to reduce the volume of the table lamp, so that the table lamp occupies a small space, reduces the packaging and transportation cost, and is convenient to carry.

[0040] In the description of the present application, it should be pointed out that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0041] The anti-loose folding structure and the table lamp provided by the present application have been described in detail above, and the principles and implementation modes of the present application have been described by applying specific examples in this paper, the above description of the embodiments is only used to help understand the present application and the core idea, it should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A folding structure for anti-loosening, comprising a folding bracket, the folding bracket comprising a first rotating arm and a second rotating arm, characterized in that: The first rotating arm has a convex rotating shaft at one end, the second rotating arm has a connecting cylinder at one end, the rotating shaft extends into the connecting cylinder and can rotate relative to the connecting cylinder, a shaft sleeve is rotatably sleeved in the connecting cylinder, the end face of the shaft sleeve close to the rotating shaft has a clamping tooth, the outer end face of the rotating shaft has a clamping groove matched with the clamping tooth, a fastener with a threaded section is arranged in the connecting cylinder, a nut groove is arranged in the first rotating arm, a nut matched with the nut groove and having a non-circular outer contour is arranged in the nut groove, the fastener passes through the shaft sleeve and extends into the first rotating arm along the axis of the rotating shaft and is matched with the threaded section through the nut to fix the clamping tooth in the clamping groove.

2. The anti-loosening folding structure according to claim 1, characterized in that: The clamping tooth has a plurality of clamping teeth which are evenly distributed along the edge of the end face of the shaft sleeve to form a clamping tooth ring, and the number of the clamping teeth corresponds to the number of the clamping grooves which are evenly distributed along the edge of the outer end face of the rotating shaft to form a clamping groove ring.

3. The anti-loosening folding structure according to claim 1, characterized in that: The end of the shaft sleeve away from the clamping tooth has a stop ring, the connecting cylinder is provided with a limiting baffle for limiting the sliding of the shaft sleeve along the direction of the rotating shaft, the limiting baffle is provided with a through hole for the shaft sleeve to pass through, and when the clamping tooth is pressed and engaged in the clamping groove, the stop ring abuts against the side of the limiting baffle away from the rotating shaft.

4. The anti-loosening folding structure according to claim 3, characterized in that: The fastener is a half-thread screw, and the stop ring is located between the limiting baffle and the screw cap.

5. The anti-loosening folding structure according to claim 4, characterized in that: The screw column of the half-thread screw is in interference fit with the shaft sleeve.

6. The anti-loosening folding structure according to claim 5, characterized in that: The threaded section is arranged on the screw column in the first rotating arm.

7. The anti-loosening folding structure according to claim 3, characterized in that: The first rotating arm has a mounting channel which is collinear with the axis of the rotating shaft and penetrates the first rotating arm and the rotating shaft, the nut groove is located in the mounting channel, and the nut groove has a mounting hole for the fastening bolt to pass through.

8. The anti-loosening folding structure according to claim 1, characterized in that: The nut groove is a hexagonal nut groove, and the nut is a hexagonal nut.

9. The anti-loosening folding structure according to claim 7, characterized in that: The side of the mounting channel away from the rotating shaft and the side of the connecting cylinder away from the rotating shaft are both provided with an outer cover for sealing the mounting channel and the connecting cylinder respectively.

10. A table lamp comprising a lampshade and a lamp holder, the lampshade is fixed on the first rotating arm of the anti-loose folding structure according to any one of claims 1 to 9, and the lamp holder is rotatably connected to the second rotating arm of the anti-loose folding structure.

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