A zoomable lamp

Abstract

A variable focus lamp comprises: a lamp holder having a concave cavity, and the opening of the concave cavity faces upward; a lamp body, arranged in the lamp holder; a first lens, arranged in the lamp holder, above the lamp body; a second lens, arranged in the lamp holder, above the first lens, and the light incident surface of the lower side of the second lens is a second concave-convex surface, and is opposite to the first concave-convex surface of the first lens, and the second lens can rotate around its own axis extending up and down under the action of external force so that the distance between the concave and convex parts on the second concave-convex surface and the concave and convex parts on the corresponding first concave-convex surface changes; a focusing ring, arranged around the axis at the periphery of the second lens, and constrained together with the second lens, so that the two can rotate together in the circumferential direction; a plurality of limiting grooves are distributed circumferentially on the lower end surface of the focusing ring; a telescopic member, arranged on the lamp holder corresponding to the lower end surface of the focusing ring, and can extend upward and selectively insert into the limiting groove or retract downward and disengage from the limiting groove. The utility model is convenient for focusing and can improve the stability of the overall structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighting lamps, and in particular relates to a variable-focus lamp. Background Art

[0002] Existing variable-focus lamps, such as the structure disclosed in the Chinese invention patent "A movable zoom lens structure and LED lamp" with patent number 202211503905.1 and authorization announcement number CN115899618B, include: a lens assembly, the lens assembly includes a first lens and a second lens stacked up and down, the light incident surface of the first lens is provided with a first protrusion, the light emitting surface of the second lens is provided with a second protrusion, and the first lens and the second lens are rotatably connected; one side of the light incident surface of the second lens is a Fresnel lens structure; an installation assembly, the installation assembly is detachably connected to the lens group, and when the first lens rotates, the relative position between the first protrusion and the second protrusion changes to change the size of the beam angle of the light output.

[0003] Existing variable-focus lamps have problems such as inconvenient operation during focusing, the operator's fingers are prone to touch the lens and contaminate the lens, and the overall structure is not stable enough, and accidental rotation may occur between the two lenses. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a variable focus lamp which is convenient for focusing and can improve the overall structural stability in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a variable focus lamp, comprising:

[0006] The lamp holder has a concave cavity, and the opening of the concave cavity faces upward;

[0007] A lamp body, disposed in the lamp holder and capable of emitting light toward the opening;

[0008] A first lens is arranged in the lamp holder and above the lamp body, and the light incident surface of the lower side of the first lens faces the lamp body, and the light emitting surface of the upper side of the first lens is a first concave-convex surface;

[0009] The second lens is arranged in the lamp holder and above the first lens, and the light incident surface on the lower side of the second lens is a second concave-convex surface, and is opposite to the first concave-convex surface of the first lens. At the same time, the second lens can rotate around its own vertically extending axis under the action of an external force so that the distance between the concave and convex parts on the second concave-convex surface and the concave and convex parts on the corresponding first concave-convex surface changes;

[0010] It is characterized by also including:

[0011] A focusing ring is arranged around the axis at the periphery of the second lens and is constrained together with the second lens so that the two can rotate circumferentially together; at the same time, a plurality of limiting grooves are distributed along the circumferential direction on the lower end surface of the focusing ring;

[0012] The telescopic member is arranged on the lamp holder corresponding to the lower end surface of the focusing ring, and can be extended upward and inserted into the limiting groove or retracted downward and separated from the limiting groove.

[0013] In this way, the second lens can be driven to rotate for focusing by rotating the focusing ring, which is convenient for operation. The cooperation between the limit groove on the lower end surface of the focusing ring and the telescopic part can limit the focusing ring in the circumferential direction, thereby avoiding accidental rotation of the focusing ring and the second lens and improving the stability of the overall structure of the lamp.

[0014] The opening direction of the concave cavity in the utility model is upward, which is an artificially defined direction (i.e., the above-mentioned "mark") for the convenience of structural description. In actual application, the opening direction can also be downward, left, right, forward, backward, etc., depending on the needs of use.

[0015] The telescopic member may be an automatically retractable member, such as an electric telescopic rod. In order to simplify the structure and facilitate operation, preferably, a limit cavity extending up and down and having an open upper end is provided in the lamp holder for the telescopic member to be restrained therein;

[0016] The telescopic member comprises a limiting block and an elastic body which acts on the lower side of the limiting block so that the limiting block always has a tendency to move upward and is inserted into the limiting groove.

[0017] In this way, when the limit slot and the limit block are aligned vertically, the limit block can move upward under the action of the elastic body and be inserted into the limit slot; when the focusing ring rotates, it can overcome the elastic force of the elastic body and press the limit block downward to make the limit block break away from the constraint of the limit slot.

[0018] Furthermore, the stop block is spherical, and the stop slot is a corresponding circular slot, so that the stop block can move up and down with the circumferential rotation of the focus ring to sequentially enter and exit each stop slot. In this way, the rotation of the focus ring is smoother, and when the focus ring rotates, the up and down movement of the stop block can hit the focus ring and make a "click" sound, thereby increasing the damping feel and improving the user experience.

[0019] Furthermore, the limiting grooves are continuously distributed on the lower end surface of the focusing ring.

[0020] In the above solution, preferably, there are at least two groups of telescopic members, which are arranged at intervals along the circumferential direction, and each telescopic member can be inserted into its corresponding limiting groove at the same time.

[0021] Preferably, the upper portion of the focus ring extends upward relative to the light-emitting surface on the upper side of the second lens, and is located outside the lamp holder. In this way, the following technical effects can be produced: 1. The upper portion of the focus ring surrounds the outer periphery of the light-emitting surface on the upper side of the second lens, which can play a role in gathering light so that the light is concentrated and emitted; 2. The upper portion of the focus ring is located outside the lamp holder and on the upper side of the second lens, which is convenient for the user to act on it with his fingers to rotate the focus ring.

[0022] In the above schemes, in order to constrain the focus ring and the second lens together so that the two can rotate together in the circumferential direction, preferably, the inner circumferential surface of the focus ring is provided with a groove extending downward, and the edge of the second lens is provided with a protrusion that can be inserted upward into the groove, and the upper groove surface of the groove is located above the protrusion to limit the protrusion from moving further upward. In this way, the protrusion can be inserted into the groove, which is convenient for assembly.

[0023] Preferably, the matching grooves and protrusions form a group, there are at least two groups, and they are arranged at intervals along the circumferential direction.

[0024] Preferably, the edge of the opening of the lamp holder is folded inward to form an inner folded edge, the focusing ring is located at the inner periphery of the opening of the lamp holder, and a flange is provided on the outer peripheral surface of the focusing ring, the flange is located below the inner folded edge and opposite to the inner folded edge. In this way, the focusing ring can be constrained on the lamp holder without affecting the rotation of the focusing ring.

[0025] Preferably, the variable-focus lamp is a spotlight, and its beam angle is 15-60°.

[0026] Compared with the prior art, the advantages of the present invention are: by providing a focusing ring and a telescopic part, rotating the focusing ring can drive the second lens to rotate for focusing, which is convenient for operation, and the cooperation between the limit groove on the lower end surface of the focusing ring and the telescopic part can limit the focusing ring in the circumferential direction, thereby avoiding accidental rotation of the focusing ring and the second lens, and improving the stability of the overall structure of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0028] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0029] Figure 3 It is a three-dimensional exploded view of an embodiment of the utility model;

[0030] Figure 4 It is a three-dimensional exploded view of an embodiment of the utility model from another viewing angle. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] like Figures 1 to 4 As shown in FIG. 1 , a preferred embodiment of a variable-focus lamp of the present invention is shown. The variable-focus lamp is a spotlight, and includes a lamp holder 1 , a lamp body 2 , a first lens 3 , a second lens 4 , a focusing ring 5 and a telescopic member 6 .

[0033] The lamp holder 1 has a cavity with an opening at the top.

[0034] The lamp body 2 is disposed in the lamp holder 1 and can emit light toward the opening direction.

[0035] The first lens 3 is circular and is disposed in the lamp holder 1 above the lamp body 2, and the light incident surface on the lower side of the first lens 3 faces the lamp body 2 for light emitted by the lamp body 2 to enter; the light emitting surface on the upper side of the first lens 3 is a first concave-convex surface 31 for light to emit.

[0036] The second lens 4 is also circular, and is disposed in the lamp holder 1, above the first lens 3, and the light-entering surface of the lower side of the second lens 4 is a second concave-convex surface 41, and is opposite to the first concave-convex surface 31 of the first lens 3, so that light can enter; the light-emitting surface of the upper side of the second lens 4 is a plane, so that light can exit. At the same time, the second lens 4 can rotate around its own vertically extending axis 40 under the action of external force, so that the spacing between the concave and convex parts on the second concave-convex surface 41 and the corresponding concave and convex parts on the first concave-convex surface 31 changes, thereby realizing the adjustment of the beam angle, and the adjustment range is 15 to 60 degrees.

[0037] The above-mentioned focusing ring 5 is arranged around the axis 40 at the periphery of the second lens 4 and the inner periphery of the opening of the lamp holder 1, and is constrained together with the second lens 4 so that the two can rotate together in the circumferential direction. Specifically, the edge of the opening of the lamp holder 1 extends horizontally inward to form an inner folding edge 12, and the outer circumferential surface of the focusing ring 5 is provided with a flange 53, which is located below the inner folding edge 12 and opposite to the inner folding edge 12. The inner circumferential surface of the focusing ring 5 is provided with four grooves 52 extending downward at intervals along the circumferential direction, and the position corresponding to each groove 52 at the edge of the second lens 4 is provided with a protrusion 42 that can be inserted upward into the corresponding groove 52, and the upper groove surface of each groove 52 is located above the corresponding protrusion 42, which is used to limit the protrusion 42 from moving further upward, so that the focusing ring 5 and the second lens 4 are constrained together and can rotate together in the circumferential direction.

[0038] At the same time, in the present embodiment, the upper portion 5a of the focusing ring 5 extends upward relative to the light emitting surface on the upper side of the second lens 4, and is located outside the lamp holder 1. A plurality of circular limiting grooves 51 are continuously distributed along the circumferential direction on the lower end surface of the focusing ring 5. The telescopic member 6 is provided on the lamp holder 1 corresponding to the lower end surface of the focusing ring 5, and can extend upward and selectively be inserted into the limiting groove 51 or retract downward and be out of the limiting groove 51. Specifically, there are four telescopic members 6, which are arranged at intervals along the circumferential direction, and a limiting cavity 11 extending up and down and open at the upper end is provided at the position corresponding to each telescopic member 6 in the lamp holder 1, so that the telescopic member 6 can be constrained therein. Each telescopic member 6 includes a spherical stopper 61 (a steel ball), and an elastic body 62 (a spring extending up and down) acting on the lower side of the stopper 61 so that the stopper 61 always has an upward movement tendency and is inserted into the stopper groove 51, so that the stopper 61 can move up and down with the circumferential rotation of the focus ring 5 to sequentially enter and exit each stopper groove 51. In this embodiment, when the focus ring 5 is rotated to the right position, the four stopper blocks 61 can be inserted into the corresponding stopper grooves 51 at the same time, and during the insertion process, under the action of the elastic body 62, the stopper block 61 can collide with the groove wall of the stopper groove 51 and make a "click" sound, reminding the user to rotate to the right position, while increasing the damping feel.

[0039] During use, the user can rotate the focusing ring 5 according to the distance between the lamp and the illuminated object and the size of the illuminated object, thereby driving the second lens 4 to rotate to change the beam angle.

[0040] In the specification and claims of the present invention, terms indicating directions, such as "upper", "lower", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A variable focus lamp, comprising: The lamp holder (1) has a concave cavity, and the opening of the concave cavity faces upward; A lamp body (2) is arranged in the lamp holder (1) and can emit light in the direction of the opening; A first lens (3) is arranged inside the lamp holder (1) and above the lamp body (2), with the light incident surface on the lower side of the first lens (3) facing the lamp body (2), and the light emitting surface on the upper side of the first lens (3) being a first concave-convex surface (31); The second lens (4) is arranged in the lamp holder (1) and above the first lens (3), and the light incident surface on the lower side of the second lens (4) is a second concave-convex surface (41) and is opposite to the first concave-convex surface (31) of the first lens (3). At the same time, the second lens (4) can rotate around its own axis (40) extending up and down under the action of external force, so that the distance between the concave and convex parts on the second concave-convex surface (41) and the corresponding concave and convex parts on the first concave-convex surface (31) changes; Features Also included are: A focusing ring (5) is arranged around the axis (40) at the periphery of the second lens (4) and is constrained together with the second lens (4) so ​​that the two can rotate together in the circumferential direction; at the same time, a plurality of limiting grooves (51) are distributed in the circumferential direction on the lower end surface of the focusing ring (5); The telescopic member (6) is arranged on the lamp holder (1) corresponding to the lower end surface of the focusing ring (5), and can be extended upwards and selectively inserted into the limiting groove (51) or retracted downwards and separated from the limiting groove (51).

2. The variable focus lamp according to claim 1, characterized in that: The lamp holder (1) is provided with a limiting cavity (11) extending up and down and having an open upper end, so that the telescopic member (6) can be restrained therein; The telescopic member (6) comprises a limiting block (61) and an elastic body (62) acting below the limiting block (61) so that the limiting block (61) always has a tendency to move upward and is inserted into the limiting groove (51).

3. The variable focus lamp according to claim 2, characterized in that: The limiting block (61) is spherical, and the limiting grooves (51) are corresponding circular grooves, so that the limiting block (61) can move up and down as the focusing ring (5) rotates in the circumferential direction to enter and exit each limiting groove (51) in sequence.

4. The variable focus lamp according to claim 3, characterized in that: The limiting grooves (51) are continuously distributed on the lower end surface of the focusing ring (5).

5. The variable focus lamp according to claim 1, characterized in that: There are at least two groups of telescopic members (6), which are arranged at intervals along the circumferential direction, and each telescopic member (6) can be inserted into its corresponding limiting groove (51) at the same time.

6. The variable focus lamp according to claim 1, characterized in that: The upper part (5a) of the focusing ring (5) extends upward relative to the light-emitting surface on the upper side of the second lens (4), and is located outside the lamp holder (1).

7. The variable focus lamp according to any one of claims 1 to 6, characterized in that: The inner peripheral surface of the focusing ring (5) is provided with a groove (52) extending downwards, and the edge of the second lens (4) is provided with a protrusion (42) which can be inserted upwards into the groove (52), and the upper groove surface of the groove (52) is located above the protrusion (42) to limit the further upward movement of the protrusion (42).

8. The variable focus lamp according to claim 7, characterized in that: The matched grooves (52) and protrusions (42) form a group, and there are at least two groups, which are arranged at intervals along the circumferential direction.

9. The variable focus lamp according to claim 7, characterized in that: The edge of the opening of the lamp holder (1) is folded and extended inward to form an inner folded edge (12), the focusing ring (5) is located inside the opening of the lamp holder (1), and a flange (53) is provided on the outer peripheral surface of the focusing ring (5), and the flange is located below the inner folded edge (12) and opposite to the inner folded edge (12).

10. The variable focus lamp according to any one of claims 1 to 6, characterized in that: The variable-focus lamp is a spotlight, and its beam angle is 15-60°.

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