Zoom lens bracket and lamp

Abstract

The present invention relates to the field of optical lighting technology, and specifically to a zoom lens holder and a lamp. The zoom lens holder includes a focusing ring, and a light source holder and a lens holder respectively located on both sides of the focusing ring; the light source holder and the focusing ring are connected by a rotational limiting mechanism, and the light source holder and the lens holder are connected by an axial limiting mechanism; the side wall of the focusing ring is provided with at least two spiral ribs, and the lens holder is provided with at least two support members, and the support members have sliding grooves; each of the support members is adapted to one of the sliding grooves; when the focusing ring is rotated, the support members slide along the spiral ribs, and the focusing ring and the lens holder undergo axial relative movement. The focusing ring and the lens holder can be assembled and disassembled by rotating the focusing ring, which facilitates the replacement of lenses with different focal lengths or different light spot styles.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lighting, and in particular to a zoom lens bracket and a lamp. Background Art

[0002] LED lamps, especially zoom lamps, often require lens replacement during use, such as changing to a different focal length or a different spot pattern. Replacing the lens requires disassembling the entire lamp, making this operation difficult and cumbersome, especially for the average user. Summary of the Invention

[0003] The purpose of the present invention is to provide a zoom lens holder to address the problem of cumbersome operation when replacing the lens of a zoom lamp in the prior art. The holder cooperates with the spiral ribs, and the lens holder and the focusing ring can be moved axially by rotating the focusing ring, thereby realizing the assembly or separation of the lens holder and facilitating the replacement of the lens.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A zoom lens bracket comprises a focus ring, and a light source bracket and a lens bracket respectively located on both sides of the focus ring;

[0006] The light source bracket and the focus ring are connected via a rotation limiting mechanism, and the rotation limiting mechanism can limit the relative movement of the focus ring and the light source bracket in the axial direction; the focus ring and the light source bracket can rotate relative to each other;

[0007] The light source bracket and the lens bracket are connected via an axial limiting mechanism, and the axial limiting mechanism can limit the relative rotation of the light source bracket and the lens bracket; the light source bracket and the lens bracket can move relative to each other in the axial direction;

[0008] The side wall of the focus ring is provided with at least two spiral ribs, and the lens holder is provided with at least two supporting members, each of the supporting members having a sliding groove, and each of the spiral ribs is adapted to fit into one of the sliding grooves; the adaptation of the spiral ribs to the sliding grooves means that the width of the sliding groove is greater than or equal to the width of the spiral ribs, so that the sliding groove slides along the spiral ribs;

[0009] When the focus ring is rotated, the support member slides along the spiral rib, and the focus ring and the lens holder move relative to each other in the axial direction. The spiral rib refers to a spiral protrusion provided along the side wall of the focus ring.

[0010] The light source bracket is fixed to the lamp body of the lamp, and the light source is fixed to the light source bracket, and the direction of light source illumination is axial. The rotation limit mechanism connects the light source bracket and the focusing ring. The light source bracket and the focusing ring can rotate relative to each other, but cannot move relative to each other in the axial direction. The axial limit mechanism connects the light source bracket and the lens bracket. The light source bracket and the lens bracket can move relative to each other in the axial direction, but cannot rotate relative to each other. With the light source bracket fixed, rotate the focusing ring, and the support moves along the spiral ribs, so that the lens bracket can move axially to achieve focal length adjustment. When the support moves beyond the end of the spiral ribs away from the light source, the lens bracket is separated from the focusing ring, which facilitates the replacement of the lens on the lens bracket. After the replacement is completed, put the lens bracket back and rotate the focusing ring in the opposite direction to achieve the assembly of the lens bracket and the focusing ring.

[0011] As a preferred embodiment of the present invention, a first limiting protrusion is provided at one end of the spiral rib away from the light source bracket; when the external force is less than a threshold value, the first limiting protrusion can limit the support member from separating from the spiral rib; when the external force is greater than the threshold value, the support member can break free from the restraint of the first limiting protrusion and separate from the spiral rib. By providing the first limiting protrusion, the width of the first limiting protrusion is slightly greater than the width of the spiral rib, and utilizing the elastic deformation of the support member, the support member and the spiral rib can only be separated when the external force exceeds the threshold value, thereby preventing the lens bracket and the focus ring from separating due to improper operation of the focus ring.

[0012] As a preferred solution of the present invention, the first limiting protrusion is 0.2mm to 0.4mm larger than the width of the sliding groove of the support member. The sliding groove can contact both sides of the spiral rib to form two contact points, and the distance between the two contact points is the width of the sliding groove.

[0013] As a preferred embodiment of the present invention, the support member includes a first support member and a second support member, which are spaced apart circumferentially. Because the spiral ribs are helical, arranging the first and second support members circumferentially spaced apart prevents them from contacting the spiral ribs simultaneously during assembly, facilitating assembly. This also simplifies the structure of the injection mold.

[0014] As a preferred solution of the present invention, the first support member is an axially long strip-shaped protrusion, and / or the second support member is an axially long strip-shaped protrusion. The long strip-shaped protrusion is conducive to increasing structural strength.

[0015] As a preferred embodiment of the present invention, the ends of the first support member and the second support member are both cylindrical in shape. The ends of the support members are cylindrical in shape, which ensures good contact and smoother rotation during assembly and focusing.

[0016] As a preferred embodiment of the present invention, the light source bracket is equipped with at least two rotating support posts; the side wall of the focus ring is circumferentially provided with at least two rotating guide grooves; each rotating support post is adapted to fit within one of the rotating guide grooves, forming the rotation limiting mechanism. The protrusions at the ends of the support posts snap into place with the guide grooves, facilitating the snapping of the focus ring onto the light source bracket.

[0017] As a preferred solution of the present invention, the light source bracket is provided with an axial guide groove, and the lens bracket is provided with an axial support column; or, the light source bracket is provided with an axial support column, and the lens bracket is provided with an axial guide groove; the axial guide groove is adapted to the axial support column to constitute the axial limiting mechanism.

[0018] As a preferred embodiment of the present invention, the lens holder is provided with at least two axial support columns, with each support member mounted on one of the axial support columns. Arranging the support members on the support columns allows the support columns to elastically deform away from the axis during assembly, facilitating assembly. The support members also enhance the structural strength of the axial support columns and simplify the structure of the injection mold.

[0019] As a preferred embodiment of the present invention, a second limiting protrusion is provided at one end of the spiral rib close to the light source bracket to prevent the lens bracket from moving beyond a lower limit toward the light source bracket during lens focusing, thereby preventing the focusing ring and the light source bracket from being separated by mistake.

[0020] As a preferred embodiment of the present invention, the outer wall of the focus ring is provided with an assembly portion. The assembly portion is used to connect to an adjustment structure outside the lamp. When designing the lamp, the adjustment structure can be provided on the lamp housing, and the focus ring can be placed inside the housing.

[0021] As a preferred solution of the present invention, the light source bracket is provided with a light source light exit hole; the lens bracket is provided with a lens buckle, and the lens bracket is provided with a lens positioning portion.

[0022] A lamp includes the aforementioned zoom lens holder. The zoom lens holder employing the aforementioned structure can be separated and assembled from the lens holder by rotating the focus ring. This allows for quick and easy lens assembly and disassembly, enabling replacement of lenses with different focal lengths or different light spot styles on a single lamp.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. The zoom lens holder of the present invention comprises a support member disposed on the lens holder and spiral ribs disposed on the focus ring, with the support member clamping the spiral ribs. The focus ring and lens holder can be assembled and disassembled by rotating the focus ring, facilitating the replacement of lenses with different focal lengths or different light spot styles. When the focus ring is rotated, the lens holder and light source holder only move relative to each other in the axial direction. Since the light source holder is fixed to the lamp, the lens holder does not rotate, and the light spot does not rotate during focusing, resulting in a stable light spot effect and excellent visual effects.

[0025] 2. The zoom lens holder of the present invention has limit protrusions at both ends of the spiral rib, wherein the limit protrusion at the lower end can prevent the lens from exceeding the lower limit value when focusing; the limit protrusion at the upper end is 0.2mm to 0.4mm larger than the gap between the upper and lower sliding support points; it has a certain blocking effect when the focusing position reaches the upper limit to avoid accidental disassembly, and when the focusing ring is rotated with a slightly greater force, the upper and lower sliding support points of the lens holder can be separated from the spiral rib.

[0026] 3. In the zoom lens holder of the present invention, the rotation guide groove on the focus ring is circumferentially arranged, the spiral ribs are spirally oriented, and the first and second support portions are staggered circumferentially. When the support members and the spiral ribs cooperate, the focus ring does not shift circumferentially or axially unless manually intervened. The lens holder only moves axially when the focus ring is rotated, which helps maintain a stable light spot.

[0027] 4. In the zoom lens holder of the present invention, the spiral ribs facilitate strengthening the structural strength of the focus ring; the support member adopts two long strip-shaped support parts, which also facilitates increasing the structural strength and simplifies the injection mold structure; an assembly part is provided on the focus ring, which increases the structural strength and facilitates setting an adjustment structure on the lamp housing when designing the lamp. Through the coordination of the adjustment structure and the assembly part, the focus ring can be easily rotated outside the lamp.

[0028] 5. The lamp of the present invention uses the above-mentioned zoom lens holder, and the focus ring and the lens holder can be assembled and disassembled by rotating the focus ring, which facilitates the replacement of lenses with different focal lengths or different light spot styles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the zoom lens bracket in Example 1.

[0030] Figure 2 This is a schematic diagram of an exploded view of the zoom lens bracket in Example 1.

[0031] Figure 3 It is a structural diagram of the light source bracket.

[0032] Figure 4This is a schematic diagram of the structure of the focus ring.

[0033] Figure 5 It is a structural diagram of the lens holder.

[0034] Figure 6 yes Figure 5 Schematic diagram of the enlarged view at circle A.

[0035] Figure 7 It is a structural diagram of the lens bracket when it is in a low position.

[0036] Figure 8 It is a schematic diagram of the coordination relationship between the spiral ribs and the support portion when the lens holder is in a low position.

[0037] Figure 9 It is a structural diagram of the lens bracket when it is in a high position.

[0038] Figure 10 This is a schematic diagram of the coordination between the spiral ribs and the support portion when the lens holder is in a high position.

[0039] Figure 11 It is a structural diagram after the lens bracket and the light source bracket are separated.

[0040] Figure 12 This is a schematic diagram of the coordination between the spiral ribs and the support portion after the lens bracket and the light source bracket are separated.

[0041] Figure 13 It is a schematic diagram of the coordination relationship between the support and the spiral rib.

[0042] Figure 14 It is a schematic diagram of the coordination relationship between the support and the spiral ribs in another state.

[0043] Figure 15 It is a schematic diagram of the matching relationship between the support member and the first limiting protrusion of the spiral rib.

[0044] Icon: 100-light source; 200-lens; 1-light source bracket; 11-rotating support column; 12-light source light output hole; 13-axial guide groove; 2-focusing ring; 21-rotating guide groove; 22-spiral rib; 221-first limiting protrusion; 222-second limiting protrusion; 23-assembly part; 3-lens bracket; 31-lens buckle; 34-lens positioning part; 32-support member; 321-first support member; 322-second support member; 33-axial support column; a-first contact point; b-second contact point. DETAILED DESCRIPTION

[0045] The present invention will be described in detail below with reference to the accompanying drawings.

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] Example 1

[0048] A zoom lens holder, such as Figure 1 and Figure 2 As shown, it includes a focus ring 2, and a light source bracket 1 and a lens bracket 3 respectively located on both sides of the focus ring 2; the light source 100 is assembled in the middle of the light source bracket 1; and the lens 200 is assembled in the middle of the lens bracket 3.

[0049] The light source bracket 1 and the focusing ring 2 are connected by a rotation limiting mechanism, and the rotation limiting mechanism can limit the relative movement of the focusing ring 2 and the light source bracket 1 in the axial direction; the focusing ring 2 and the light source bracket 1 can rotate relative to each other; the light source bracket 1 and the lens bracket 3 are connected by an axial limiting mechanism, and the axial limiting mechanism can limit the relative rotation of the light source bracket 1 and the lens bracket 3; the light source bracket 1 and the lens bracket 3 can move relative to each other in the axial direction; the side wall of the focusing ring 2 is provided with at least two spiral ribs 22, and the lens bracket 3 is provided with at least two support members 32, each of the support members 32 has a sliding groove, and each of the spiral ribs 22 is adapted to a sliding groove; when the focusing ring 2 is rotated, the support member slides along the spiral rib 22, and the focusing ring 2 and the lens bracket 3 undergo axial relative movement.

[0050] In this embodiment, three spiral ribs 22 are provided on the focus ring 2, and three support members 32 are provided on the lens bracket 3. In other embodiments, the number of spiral ribs 22 and support members can also be two, four, five or more. When in use, the light source bracket 1 is fixed to the lamp body of the lamp, and the light source is fixed to the light source bracket 1, and the direction of light source illumination is axial. Figure 2 In the embodiment, the light source 100 emits light upwards, and the optical axis direction is the axial direction. When rotating, the focus rotates around the optical axis.

[0051] The specific configuration of the rotation limiting mechanism is as follows: the light source bracket 1 is provided with at least two rotation support columns 11; the side wall of the focus ring 2 is provided with at least two rotation guide grooves 21 along the circumference; each of the rotation support columns 11 is adapted to one of the rotation guide grooves 21 to form the rotation limiting mechanism. The protrusions at the ends of the support columns are snap-connected to the guide grooves, making it convenient to snap the focus ring 2 onto the light source bracket 1. In this embodiment, a total of three rotation limiting mechanisms are provided. In other embodiments, the number of rotation limiting mechanisms can be two, four, or more. Preferably, the multiple rotation limiting mechanisms are evenly distributed along the circumference.

[0052] The specific configuration of the axial limiting mechanism is as follows: the light source bracket 1 is provided with an axial guide groove 13, and the lens bracket 3 is provided with an axial support column 33; the axial guide groove 13 is adapted to the axial support column 33 to form the axial limiting mechanism. In this embodiment, a total of three axial limiting mechanisms are provided. In other schemes, the number of axial limiting mechanisms can be two, four or more. Preferably, the multiple axial limiting mechanisms are evenly distributed along the circumference. Alternatively, the light source bracket 1 is provided with an axial support column 33, and the lens bracket 3 is provided with an axial guide groove 13.

[0053] like Figure 3 As shown, the middle portion of the light source bracket 1 is a light source light outlet 12 , and three axial guide grooves 13 and three rotating support columns 11 are evenly arranged around it.

[0054] like Figure 4 As shown, the focusing ring 2 is a cylindrical ring, and the side wall is provided with three elongated holes as a rotation guide groove 21; the spiral rib 22 refers to a spiral protrusion at one end provided along the side wall of the focusing ring 2. Three spiral ribs 22 are provided on the outer wall, and the end of the spiral rib 22 away from the light source bracket 1 is provided with a first limiting protrusion 221; the end of the spiral rib 22 close to the light source bracket 1 is provided with a second limiting protrusion 222. The outer wall of the focusing ring 2 is provided with an assembly part 23. When designing the lamp, an adjustment structure can be provided on the lamp housing, and the focusing ring 2 is provided inside the housing. The first limiting protrusion 221 is 0.2mm to 0.4mm larger than the width of the sliding groove of the support. As shown Figure 4 As shown, the spiral rib 22 has an upper surface, a lower surface and a side surface. When the spiral rib 22 is matched with the support member 2, the upper surface contacts the first support member and the lower surface contacts the second support member.

[0055] like Figure 5 As shown, the lens holder 3 is provided with three axial support columns 33, and each support member is provided on one of the axial support columns 33. That is, the inner side of each longitudinal support column is provided with a first support member 321 and a second support member 322. Figure 6As shown, the first support member 321 and the second support member 322 are spaced apart in the circumferential direction. The first support member 321 is an axially elongated protrusion, and the second support member 322 is an axially elongated protrusion. The ends of the first support member 321 and the second support member 322 are both cylindrical in shape. Arranging the support members on the support column allows the support column to elastically deform away from the axis during assembly, facilitating assembly. The support members also enhance the structural strength of the axial support column 33 and simplify the structure of the injection mold. In other embodiments, the first support member 321 and the second support member 322 can also be cylindrical or semi-cylindrical. The ends of the support members are cylindrical in shape, ensuring good contact and smoother rotation during assembly and focusing. The lens holder 3 is provided with a lens latch 31 and a lens positioning portion 34 to facilitate lens positioning and installation.

[0056] When in use, each state diagram is as follows Figure 7-12 shown.

[0057] Figure 7 and Figure 8 In the figure, the lens holder 3 is in the low position, that is, the distance between the lens holder 3 and the light source holder 1 is the shortest, and the first support member 321 on the upper side is blocked by the second limiting protrusion 222, and the focus ring 2 cannot be rotated counterclockwise. When the focus ring 2 is rotated clockwise, the support member slides along the spiral rib 22 to the first limiting protrusion, as shown in FIG. Figure 9 and Figure 10 As shown, at this time, the lens bracket 3 is in a high position, that is, the distance between the lens bracket 3 and the light source bracket 1 is the farthest. At this time, the first limiting protrusion forms a block on the upper end of the second support member 322. When the external force is less than the threshold, the first limiting protrusion 221 can limit the support member from separating from the spiral rib 22; when the external force is greater than the threshold, the support member can break away from the restriction of the first limiting protrusion 221 and separate from the spiral rib 22. Figure 11 and Figure 12 shown.

[0058] The sliding groove of the support member is adapted to the spiral rib 22, and the sliding groove can contact both sides of the spiral rib 22 to form two contact points. The distance between the two contact points is the width of the sliding groove. In order to avoid jamming during rotation, in the preferred solution, Figure 13 and Figure 14 As shown, the width of the sliding groove is set to be greater than the width of the spiral rib (the first support member 321 and the second support member 322 are not in contact with the spiral rib 22 at the same time). Figure 13When the first support member 321 contacts the upper surface of the spiral rib, the contact point is the first contact point a, and there is a gap between the second support member 322 and the lower surface of the spiral rib. When the second support member 322 contacts the lower surface of the spiral rib, the contact point is the second contact point b, and there is a gap between the first support member 321 and the upper surface of the spiral rib. The distance between contact point a and contact point b is the width of the sliding groove. Figure 15 As shown, the width of the first limiting protrusion 221 is greater than the width of the sliding groove. When the upper end of the first limiting protrusion contacts the first support member 321, the lower end of the first limiting protrusion contacts the second support member 322. When the external force is less than the threshold, the movable groove cannot move to the right and separate from the first limiting protrusion. When the external force is greater than the threshold, the upper and lower ends of the first limiting protrusion, the lower end of the first support member 321 and the upper end of the second support member 322 are elastically deformed, so that the sliding groove is separated from the first limiting protrusion.

[0059] When installing the lens, turn the focus ring 2 clockwise to the limit position, put the assembled lens and lens bracket 3 onto the outside of the focus ring 2, and align the axial support column 33 with the axial guide groove 13 of the light source bracket 1. At this time, the support member is adapted to the position of the first limiting protrusion 221 (such as Figure 12 ), slightly twist the focus ring 2 counterclockwise to make the first support member 321 and the second support member 322 pass through the first limiting protrusion 221 on the spiral rib 22, (as Figure 10 ), the first support member 321 and the second support member 322 clamp the spiral rib 22, and the lens is now installed. You can turn the focus ring 2 to adjust the focal length and use the lamp. When replacing the lens, turn the focus ring 2 clockwise until Figure 12 In the state shown, continue to twist clockwise, the first support member 321 and the second support member 322 will be separated from the first limiting protrusion 221 at the upper end of the spiral rib 22, and the lens holder 3 can be removed to replace the lens.

[0060] Example 2

[0061] A lamp includes the zoom lens holder described in Example 1. With the zoom lens holder having the above structure, the lens holder 3 and the focus ring 2 can be separated and assembled by rotating the focus ring 2. This allows for quick and easy lens assembly and disassembly, enabling replacement of lenses with different focal lengths or different light spot styles on a single lamp.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A zoom lens holder, characterized in that: It comprises a focus ring (2), and a light source bracket (1) and a lens bracket (3) respectively located on both sides of the focus ring (2); The light source bracket (1) and the focus ring (2) are connected via a rotation limiting mechanism, and the rotation limiting mechanism is capable of limiting the relative movement of the focus ring (2) and the light source bracket (1) in the axial direction; the focus ring (2) and the light source bracket (1) are capable of relative rotation; The light source bracket (1) and the lens bracket (3) are connected via an axial limiting mechanism, and the axial limiting mechanism is capable of limiting relative rotation of the light source bracket (1) and the lens bracket (3); the light source bracket (1) and the lens bracket (3) are capable of relative movement in the axial direction; The side wall of the focus ring (2) is provided with at least two spiral ribs (22), the spiral rib being a spiral protrusion provided along the side wall of the focus ring; the lens holder (3) is provided with at least two support members (32), the support members (32) having a sliding groove; each of the spiral ribs (22) is adapted to one of the sliding grooves; the adaptation of the spiral ribs to the sliding grooves means that the width of the sliding groove is greater than or equal to the width of the spiral ribs, so that the sliding groove slides along the spiral ribs; When the focus ring (2) is rotated, the support member (32) slides along the spiral rib (22), and the focus ring (2) and the lens holder (3) undergo axial relative movement. When the support member moves beyond the end of the spiral rib away from the light source, the lens holder separates from the focus ring.

2. The zoom lens holder according to claim 1, wherein: A first limiting protrusion (221) is provided at one end of the spiral rib (22) away from the light source bracket (1); When the external force is less than a threshold value, the first limiting protrusion (221) can limit the support member from being separated from the spiral rib (22); when the external force is greater than the threshold value, the support member (32) can be separated from the restriction of the first limiting protrusion (221) and separated from the spiral rib (22).

3. The zoom lens holder according to claim 2, wherein: The first limiting protrusion (221) is 0.2 mm to 0.4 mm wider than the sliding groove of the support member (32).

4. The zoom lens holder according to claim 1, wherein: The support member comprises a first support member (321) and a second support member (322), the sliding groove is formed between the first support member (321) and the second support member (322), and the first support member (321) and the second support member (322) are arranged at intervals in the circumferential direction.

5. The zoom lens holder according to claim 4, wherein: The first support member (321) is a long strip-shaped protrusion along the axial direction, and / or the second support member (322) is a long strip-shaped protrusion along the axial direction.

6. The zoom lens holder according to claim 4, wherein: The end of the first support member (321) and the end of the second support member (322) are both in the shape of cylindrical side surfaces.

7. The zoom lens holder according to any one of claims 1 to 6, characterized in that: The light source bracket (1) is provided with at least two rotating support columns (11); the side wall of the focusing ring (2) is provided with at least two rotating guide grooves (21) along the circumference; each rotating support column (11) is matched with one rotating guide groove (21) to form the rotating limiting mechanism.

8. The zoom lens holder according to any one of claims 1 to 6, characterized in that: The light source bracket (1) is provided with an axial guide groove (13), and the lens bracket (3) is provided with an axial support column (33); or, the light source bracket (1) is provided with an axial support column (33), and the lens bracket (3) is provided with an axial guide groove (13); the axial guide groove (13) is adapted to the axial support column (33) to form the axial limiting mechanism.

9. The zoom lens holder according to claim 8, wherein: The lens holder (3) is provided with at least two axial support columns (33), and each of the support members is arranged on one of the axial support columns (33).

10. The zoom lens holder according to any one of claims 1 to 6, characterized in that: A second limiting protrusion (222) is provided at one end of the spiral rib (22) close to the light source bracket (1).

11. The zoom lens holder according to any one of claims 1 to 6, characterized in that: An outer wall of the focus ring (2) is provided with an assembly portion (23).

12. The zoom lens holder according to any one of claims 1 to 6, characterized in that: The light source bracket (1) is provided with a light source light exit hole (12); the lens bracket (3) is provided with a lens buckle (31); and the lens bracket (3) is provided with a lens positioning portion (34).

13. A lamp, characterized in that: It comprises a zoom lens holder as described in any one of claims 1-12.

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