Angle-adjustable multi-head table lamp

Abstract

The utility model discloses an angle-adjustable multi-head desk lamp, which comprises a lamp holder, a fixed seat and at least one lamp cap, the fixed seat is fixedly connected with the lamp holder through a support rod, the lamp cap is arranged along the circumferential direction of the fixed seat, a connecting shaft sleeve is arranged between the lamp cap and the fixed seat, and the lamp cap is hinged at one end of the connecting shaft sleeve through a hinge block. The other end of the connecting shaft sleeve is rotationally connected to the fixing base. The hinge block and the connecting shaft sleeve are plastic parts. The positioning convex edge is arranged on the inner wall of the connecting shaft sleeve, the positioning grooves are formed in the side wall of the hinge block, the hinge block and the connecting shaft sleeve are plastic parts, the positioning convex edge is embedded into the different positioning grooves by rotating the lamp holder through matching of the positioning convex edge and the positioning grooves, and limiting of the lamp holder is achieved; the problems that the lamp holder cannot swing and the irradiation angle of the table lamp cannot be adjusted due to the fact that the clamping force between the connecting shaft sleeve and the hinge block is reduced are solved, and the service life of the table lamp is prolonged.

Description

Technical Field

[0001] This utility model relates to a lighting fixture, and more particularly to a table lamp. Background Technology

[0002] In current desk lamp structures, the lamp head adjustment mechanism generally uses a lamp head hinged to the lamp holder. The clamping force between the hinge on the lamp head and the lamp holder is used to fix the position of the lamp head, preventing it from rotating due to gravity. For example, patent document CN203797457U discloses a shadowless adjustable desk lamp, which uses a clamping hinge to fix the lamp head to the lamp holder. Since this clamping hinge is mostly made of metal, after long-term use, the contact surface will wear due to repeated friction between the metal parts. The hinge gap between the lamp head and the lamp holder will increase, resulting in a decrease in the clamping force of the clamping hinge. The lamp head will then be unable to maintain the adjusted angle due to its own weight, causing the desk lamp lamp head to lose its swing adjustment function and shortening the lifespan of the desk lamp. Utility Model Content

[0003] To address the problem of desk lamps being unable to adjust the illumination angle due to increased hinge gaps, this invention provides a multi-head desk lamp with adjustable angle.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An adjustable multi-head desk lamp includes a lamp base, a fixed base, and lamp heads. The fixed base is fixedly connected to the lamp base via a support rod. At least one lamp head is arranged circumferentially along the fixed base. A connecting sleeve is provided between the lamp head and the fixed base. The lamp head is hinged to one end of the connecting sleeve via a hinge block. The other end of the connecting sleeve is rotatably connected to the fixed base. Both the hinge block and the connecting sleeve are made of plastic. A positioning protrusion is provided on the inner wall of the connecting sleeve, and multiple positioning grooves are provided on the side wall of the hinge block. Both the hinge block and the connecting sleeve are made of plastic. Through the cooperation of the positioning protrusion and the positioning grooves, rotating the lamp head causes the positioning protrusion to engage with different positioning grooves, thereby limiting the position of the lamp head. This prevents the clamping force between the connecting sleeve and the hinge block from decreasing, which could cause the lamp head to be unable to swing and the illumination angle of the desk lamp to be unable to be adjusted, thus extending the service life of the desk lamp.

[0006] The inner wall of the connecting bushing is also provided with a positioning protrusion, and the side wall of the hinge block is provided with a positioning groove. The positioning protrusion is inserted into the positioning groove to limit the position of the lamp head.

[0007] The positioning protrusion is arranged in a horizontal direction, and the positioning groove is provided with several grooves.

[0008] The positioning groove includes a first positioning groove, a second positioning groove, and a third positioning groove, wherein the first positioning groove is arranged along the horizontal direction, the second positioning groove is arranged at a 45-degree angle to the horizontal direction, and the third positioning groove is arranged perpendicular to the horizontal direction.

[0009] The hinge block has hinge shafts on both sides, and the connecting shaft sleeve has hinge holes at positions corresponding to the hinge shafts.

[0010] A connecting ring is provided at one end of the connecting bushing near the fixed seat. A concave limiting groove is provided circumferentially at one end of the connecting bushing near the connecting ring. A limiting retaining ring is provided on the fixed seat, which extends into the limiting groove to restrict the axial movement of the connecting bushing, so that the connecting bushing and the fixed seat form a rotatable connection.

[0011] A damping ring is fitted onto the connecting ring, and a damping groove is provided on the fixed seat to adapt to the edge of the damping ring. The damping ring is placed in the damping groove. When the connecting bushing is rotated, the edge of the damping ring rotates relative to the inner wall of the damping groove, providing sliding friction.

[0012] The center of the connecting bushing and the hinge block are connected to form a wire passage for the wire to pass through. The wire passes from the fixed base into the lamp holder along the wire passage.

[0013] The hinge block has a through-line notch at one end that is hinged to the connecting shaft sleeve.

[0014] The beneficial effects of this utility model are as follows: The inner wall of the connecting bushing is provided with a positioning protrusion, and the side wall of the hinge block is provided with multiple positioning grooves. Both the hinge block and the connecting bushing are plastic parts. Through the cooperation of the positioning protrusion and the positioning grooves, the lamp head is rotated to make the positioning protrusion embed into different positioning grooves, thereby limiting the lamp head. This will prevent the clamping force between the connecting bushing and the hinge block from decreasing, which would cause the lamp head to be unable to swing and the illumination angle of the desk lamp to be unable to be adjusted, thus extending the service life of the desk lamp. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 yes Figure 2 A magnified view of A in the middle.

[0019] Figure 4 yes Figure 2A magnified view of B in the middle.

[0020] Figure 5 This is a schematic diagram of the hinge block.

[0021] Figure 6 This is a schematic diagram of the structure when the lamp head is adjusted to a horizontal position.

[0022] Figure 7 This is a schematic diagram of the structure when the lamp head is adjusted to a vertical position.

[0023] Figure 8 This is a schematic diagram of the structure of Embodiment 2.

[0024] Figure 9 This is a schematic diagram of the structure of Embodiment 3. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0026] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0027] Reference Figures 1 to 9 An adjustable multi-head desk lamp includes a lamp base 1, a fixing base 2, and lamp heads 3. The fixing base 2 is fixedly connected to the lamp base 1 via a support rod 4. At least one lamp head 3 is arranged along the circumference of the fixing base 2. The number of lamp heads can be increased according to needs, as shown in the attached drawings of the specification. It can be set to two lamp heads or four lamp heads, or other numbers if needed to meet the requirements of multi-directional illumination. A connecting bushing 5 is provided between the lamp head 3 and the fixing base 2. The lamp head 3 is hinged to one end of the connecting bushing 5 via a hinge block 6. The other end of the connecting bushing 5 is rotatably connected to the fixing base 2. Both the hinge block 6 and the connecting bushing 5 are plastic parts. By rotating the connecting bushing and swinging the hinge block, the lamp head can be adjusted in axial rotation and pitch angle in the connecting bushing, meeting the requirements of multi-directional and multi-angle illumination. Furthermore, the plastic parts have a certain degree of elasticity, which, combined with the locking and limiting of the positioning protrusion and the positioning groove, avoids the problem of adjustment failure caused by the decrease in clamping force after long-term use of traditional metal parts, ensuring the stability and reliability of lamp head angle adjustment.

[0028] In this embodiment, two lamp heads 3 are arranged circumferentially along the fixed base 2, and the two lamp heads are mirror images of each other with the support rod as the axis.

[0029] In the second embodiment, four lamp heads 3 are arranged around the circumference of the fixing base 2, and the four lamp heads are evenly distributed around the circumference of the fixing base.

[0030] In embodiment 3, one lamp head 3 is provided along the circumference of the fixing base 2.

[0031] The inner wall of the connecting bushing 5 is also provided with a positioning protrusion 50, and the side wall of the hinge block 6 is provided with a positioning groove. The positioning protrusion 50 is inserted into the positioning groove to restrict the position of the lamp head 3. The positioning protrusion 50 is arranged in the horizontal direction, and there are several positioning grooves. The positioning grooves include a first positioning groove 60, a second positioning groove 61, and a third positioning groove 62. The first positioning groove 60 is arranged in the horizontal direction, the second positioning groove 61 is arranged at a 45-degree angle to the horizontal direction, and the third positioning groove 62 is arranged perpendicular to the horizontal direction. In this embodiment, three positioning grooves with angles of 0 degrees, 45 degrees, and 90 degrees to the horizontal plane are provided. Multiple adjustable angles can be achieved through positioning grooves with multiple angles. In actual production, the angle between the positioning groove and the horizontal direction can also be adjusted according to actual needs. It can be set to other angles within the range of 0-90 degrees, such as 10 degrees, 20 degrees, 30 degrees, etc. The number of positioning grooves can also be increased or decreased.

[0032] The hinge block 6 has hinge shafts 63 on both sides, and the connecting bushing 5 has hinge holes 51 at the positions corresponding to the hinge shafts 63.

[0033] A connecting ring 52 is provided at one end of the connecting bushing 5 near the fixed base 2. A concave limiting groove 53 is provided circumferentially at one end of the connecting bushing 5 near the connecting ring 52. A limiting retaining ring 20 is provided on the fixed base 2, which extends into the limiting groove 53 to restrict the axial movement of the connecting bushing 5, so that the connecting bushing 5 and the fixed base 2 form a rotatable connection. A damping ring 7 is fitted on the connecting ring 52. A damping groove 21 is provided on the fixed base 2, which is adapted to the edge of the damping ring 7. The damping ring 7 is placed in the damping groove 21. When the connecting bushing 5 is rotated, the edge of the damping ring 7 rotates relative to the inner wall of the damping groove 21, providing sliding friction. The limiting groove and the limiting retaining ring cooperate to restrict the axial movement of the connecting bushing, ensuring that it can only rotate around the fixed seat in the circumferential direction; the frictional cooperation between the damping ring and the damping groove provides appropriate resistance to the rotation of the connecting bushing, so that the lamp head can stay stably in the adjusted position after circumferential adjustment, avoiding displacement due to slight contact and improving the stability of use.

[0034] The connecting bushing 5 and the hinge block 6 are connected at their centers to form a wire-passing channel for the wire to pass through. The wire passes through the wire-passing channel from inside the fixed base 2 into the lamp head 3. At the end of the hinge block 6 that is hinged to the connecting bushing 5, there is a wire-passing notch 64. The wire-passing channel hides the wire inside, avoiding the aesthetic loss or accidental damage caused by exposed wires, and improving the overall neatness and safety of the lamp. The wire-passing notch provides clearance for the wire at the hinge point, preventing the wire from being squeezed, worn or tangled when the lamp head is tilted, ensuring the stability of the circuit connection and extending the service life of the wire.

[0035] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An adjustable-angle multi-head desk lamp, comprising a lamp base (1), a fixing base (2), and a lamp head (3), wherein the fixing base (2) is fixedly connected to the lamp base (1) via a support rod (4), characterized in that... At least one lamp head (3) is provided along the circumference of the fixed base (2). A connecting bushing (5) is provided between the lamp head (3) and the fixed base (2). The lamp head (3) is hinged to one end of the connecting bushing (5) by a hinge block (6). The other end of the connecting bushing (5) is rotatably connected to the fixed base (2). Both the hinge block (6) and the connecting bushing (5) are plastic parts.

2. The adjustable angle multi-head desk lamp according to claim 1, characterized in that... The inner wall of the connecting bushing (5) is also provided with a positioning protrusion (50), and the side wall of the hinge block (6) is provided with a positioning groove. The positioning protrusion (50) is inserted into the positioning groove to restrict the position of the lamp head (3).

3. The adjustable angle multi-head desk lamp according to claim 2, characterized in that... The positioning protrusion (50) is arranged in the horizontal direction, and the positioning groove is provided with several grooves.

4. The adjustable angle multi-head desk lamp according to claim 3, characterized in that... The positioning groove includes a first positioning groove (60), a second positioning groove (61) and a third positioning groove (62), wherein the first positioning groove (60) is arranged along the horizontal direction, the second positioning groove (61) is arranged at a 45-degree angle with the horizontal direction, and the third positioning groove (62) is arranged perpendicular to the horizontal direction.

5. The adjustable angle multi-head desk lamp according to claim 1, characterized in that... The hinge block (6) has hinge shafts (63) on both sides, and the connecting bushing (5) has hinge holes (51) at the positions corresponding to the hinge shafts (63).

6. The adjustable-angle multi-head desk lamp according to claim 1, characterized in that... The connecting bushing (5) is provided with a connecting ring (52) at one end near the fixed seat (2). The connecting bushing (5) is provided with a concave limiting groove (53) along the circumferential direction at one end near the connecting ring (52). The fixed seat (2) is provided with a limiting retaining ring (20) extending into the limiting groove (53) to restrict the connecting bushing (5) from moving axially, so that the connecting bushing (5) and the fixed seat (2) form a rotational connection.

7. The adjustable-angle multi-head desk lamp according to claim 6, characterized in that... A damping ring (7) is fitted on the connecting ring (52), and a damping groove (21) adapted to the edge of the damping ring (7) is provided on the fixing seat (2). The damping ring (7) is placed in the damping groove (21). When the connecting bushing (5) is rotated, the edge of the damping ring (7) rotates relative to the inner wall of the damping groove (21), providing sliding friction.

8. The adjustable angle multi-head desk lamp according to claim 1, characterized in that... The center of the connecting bushing (5) and the hinge block (6) are connected to form a wire passage for the wire to pass through. The wire passes through the wire passage from the fixed seat (2) into the lamp holder (3).

9. The adjustable-angle multi-head desk lamp according to claim 8, characterized in that... The hinge block (6) has a through-line notch (64) at one end that is hinged to the connecting bushing (5).

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