Lens fixing assembly and projector

Abstract

The utility model relates to the technical field of projection equipment, and provides a lens fixing assembly, which comprises a fixing seat provided with a mounting hole used for mounting a lens, and a supporting surface used for supporting the back surface of the lens is arranged in the mounting hole; the at least two clamping pieces are arranged on the periphery of the mounting hole, and each clamping piece is provided with a clamping part and a supporting part; in the process of mounting the lens into the mounting hole, the clamping part of the clamping piece is extruded, so that the supporting part is elastically bent; after the back face of the lens abuts against the supporting face, the supporting part elastically retracts. And the clamping part generates a pressing force at least comprising a downward direction on the lens. Therefore, according to the utility model, pressing force is generated on the lens through the clamping piece, so that the risk of falling off of the lens in the Z direction is avoided. Meanwhile, an existing dispensing fixing mode is replaced, the operation procedure of lens fixing is simplified, and the assembling efficiency is improved. The utility model provides a projector with the fixing assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of projection equipment, and in particular relates to a lens fixing component and a projector. Background Art

[0002] See also Figure 1 The existing method of fixing the lens 2 of the micro-projector is to infiltrate UV into the positioning ring surface 11 of the fixing seat 1 and the side surface of the lens 2 and between the supporting surface 12 and the back of the lens 2, and fix the lens 2 on the fixing seat 1 after irradiation and curing.

[0003] The existing fixing method has no constraint in the Z direction, and the back of the lens 2 is easily caused to fall off when a force is applied to the back side.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] The utility model provides a lens fixing assembly, aiming to solve the technical problem that the lens lacks constraint in the Z direction and is easy to fall off.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a lens fixing assembly, comprising:

[0007] A fixing seat, having a mounting hole for mounting the lens, wherein a supporting surface for supporting the back of the lens is provided in the mounting hole;

[0008] At least two clamping members are arranged around the mounting hole, and the clamping members have a clamping portion and a supporting portion;

[0009] During the process of installing the lens into the mounting hole, the clamping part of the clamping member is squeezed to cause the supporting part to bend elastically; and after the back side of the lens abuts against the supporting surface, the supporting part is elastically recovered; the clamping part generates a clamping force on the lens in at least a downward direction.

[0010] According to the lens fixing assembly of the utility model, the inner wall of the mounting hole of the fixing seat forms a positioning annular surface; the positioning annular surface is configured to cooperate with the outer side surface of the lens to constrain the lens in the radial direction of the mounting hole and / or limit the concentricity of the lens and the mounting hole.

[0011] According to the lens fixing assembly of the utility model, the clamping portion protrudes toward the center direction of the mounting hole relative to the supporting portion, and after the lens is installed in the mounting hole, there is a gap between the supporting portion and the outer side surface of the lens.

[0012] According to the lens fixing assembly of the utility model, the clamping portion has a pressing surface that matches the lens.

[0013] According to the lens fixing assembly of the utility model, the pressing surface is in the shape of a spherical arc and has the same radius as the spherical arc surface of the lens; the pressing surface is configured to fit the lens in a surface contact manner to generate a pressing force directed toward the center of the spherical arc surface of the lens.

[0014] According to the lens fixing assembly of the utility model, the cross-sectional shape of the clamping portion is an arc shape.

[0015] According to the lens fixing assembly of the utility model, the clamping portion has an inclined introduction surface.

[0016] According to the lens fixing assembly of the utility model, the clamping portion also has a vertical guide surface.

[0017] According to the lens fixing assembly of the utility model, the material of the clamping piece is plastic, rubber or silicone.

[0018] A projector, characterized in that it has a lens fixing component; the projector is a micro projector.

[0019] The utility model provides a lens fixing assembly, which generates a pressing force on the lens through a clamping member to avoid the risk of the lens falling off in the Z direction. At the same time, the utility model replaces the existing glue-dispensing fixing method, simplifies the lens fixing operation process, and improves the assembly efficiency. The utility model provides a projector with the fixing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prior art;

[0021] Figure 2 It is a structural schematic diagram of the utility model in a separated state;

[0022] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle A area;

[0023] Figure 4 It is a structural schematic diagram of the fixed state of the utility model;

[0024] Figure 5 yes Figure 4 A schematic diagram of the structure of an embodiment of the middle B area;

[0025] Figure 6 yes Figure 5 A schematic structural diagram of an embodiment of a middle clamping portion;

[0026] Figure 7 yes Figure 4 A schematic diagram of the structure of an embodiment of the middle B area;

[0027] Figure 8 yes Figure 4 A schematic diagram of the structure of an embodiment of the middle B area;

[0028] In the figure: 1-fixed seat, 11-positioning annular surface, 12-support surface; 2-lens, 3-clamping piece, 31-support arm, 32-clamping part, 321-introduction surface, 322-guide surface, 323-pressing surface. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] See also Figure 2 The utility model provides a lens fixing assembly, comprising

[0031] The fixing seat 1 is provided with a mounting hole for mounting the lens 2, and the mounting hole is provided with a supporting surface 12 for supporting the back of the lens 2;

[0032] At least two clamping members 3 are evenly arranged around the center of the mounting hole, and the clamping member 3 has a clamping portion 32 and a supporting portion; Figure 4 and Figure 5 During the process of inserting the lens 2 into the mounting hole, the clamping portion 32 of the clamping member 3 is squeezed to make the support portion elastically bend; and after the back of the lens 2 abuts against the support surface 12, the support portion elastically retracts; the clamping portion 32 generates a downward pressing force on the lens 2; the downward pressing force generates a downward component force in the vertical direction, that is, along Figure 1 The component force in the opposite direction of the middle Z direction presses the lens 2 onto the supporting surface 12.

[0033] The pressing force generated by the clamping portion 32 of the present invention on the lens 2 can be provided by the elastic deformation of the support portion; it can also be provided by the deformation generated by the clamping portion 32 itself; or it can be provided by both.

[0034] The clamping member 3 of the present invention is preferably made of plastic, but may also be made of rubber or silicone etc. Depending on the material of the clamping member 3, the source of the clamping force is also different.

[0035] In order to further protect the lens 2 , a flexible buffer pad is provided at the position where the clamping portion and / or the supporting portion contacts the lens 2 .

[0036] In the utility model, the number of clamping members surrounding the center of the mounting hole is 3 and is evenly distributed. Of course, an uneven distribution method can also be adopted. According to actual needs, 2, 4, 5 or 6 clamping members can be set around the mounting hole. The clamping members can also be set to be evenly distributed or unevenly distributed around the mounting hole according to actual needs.

[0037] Combination Figure 5 The clamping force F of the clamping part 32 on the lens 2 can be decomposed into a vertical downward component and a horizontal component pointing to the center of the mounting hole; the vertical downward component presses the lens 2 on the supporting surface 12, increasing the Z-direction constraint to prevent the lens 2 from falling off; the horizontal component of each clamping member 3 constitutes a constraint in the horizontal plane.

[0038] The utility model generates a pressing force on the lens 2 through the clamping member 3 to avoid the risk of the lens 2 falling off in the Z direction. At the same time, the utility model replaces the existing glue-point fixing method, simplifies the operation process of fixing the lens 2, and improves the assembly efficiency.

[0039] See also Figure 3 As an implementation of the clamping member 3, the support portion is a support arm 31, which is easy to bend elastically when under pressure.

[0040] Embodiment 1:

[0041] Combination Figure 4 The inner wall of the mounting hole of the fixing seat 1 forms a positioning annular surface 11, and the positioning annular surface 11 is configured to cooperate with the outer side surface of the lens 2 to constrain the lens 2 in the radial direction of the mounting hole;

[0042] Optionally, the positioning annular surface 11 cooperates with the outer side surface of the lens 2 to limit the concentricity between the lens 2 and the mounting hole.

[0043] Accordingly, the clamping portion 32 of the clamping member 3 protrudes toward the center of the mounting hole relative to the support arm 31. After the lens 2 is installed, there is a gap between the support arm 31 and the outer side surface of the lens 2, thereby preventing the lens 2 from being cut or stuck due to contact with the support arm 31. This also prevents the concentricity of the lens 2 from being affected.

[0044] Furthermore, the positioning annular surface and the clamping portion are on the same circle, the positioning annular surface and the clamping portion are arranged alternately, and there is a gap between the positioning annular surface and the clamping portion.

[0045] Embodiment 2:

[0046] See also Figure 6 This embodiment improves the fitting mode between the clamping part 32 of the clamping member 3 and the lens 2; the clamping part 32 has a pressing surface 323 that cooperates with the lens 2; the contact area with the lens 2 is increased, and the stability of the lens 2 is improved.

[0047] Furthermore, the pressing surface 323 is in the shape of a spherical arc and has the same radius as the spherical arc surface of the lens 2; the pressing surface 323 is in surface contact with the lens 2, and the generated pressing force points to the center of the spherical arc surface of the lens 2, so that the force on the lens 2 is balanced and the stability is high.

[0048] Embodiment three:

[0049] See also Figure 7 This embodiment improves the shape of the clamping part 32 of the clamping member 3; the cross-sectional shape of the clamping part 32 is an arc shape; it is easy to form in the manufacturing stage. The crimping area is small, and when the crimping position is close to the spherical arc surface and the side surface of the lens 2, it can ensure that there is no contact with the side surface of the lens 2, thereby generating sufficient downward force to ensure the fixing effect of the lens 2.

[0050] Furthermore, the clamping portion 32 may be a spherical structure or a semi-cylindrical structure.

[0051] Embodiment 4:

[0052] See also Figure 8 This embodiment improves the introduction method of the lens 2 into the mounting hole. The clamping portion 32 has an inclined introduction surface 321; when the lens 2 enters the mounting hole, it is easy to adjust so that each clamping member 3 is pressed open at the same time.

[0053] Combination Figure 3 Furthermore, the clamping portion 32 also has a vertical guide surface 322, which corrects the posture of the lens 2 when it enters the mounting hole to avoid tilting, so that each clamping member 3 can be elastically recovered at the same time, thereby improving the one-time success rate of the installation operation.

[0054] The utility model provides a projector with the fixing assembly. Preferably, the projector of the utility model is a micro projector.

[0055] In summary, the utility model provides a lens fixing assembly, which generates a pressing force on the lens through a clamping member to avoid the risk of the lens falling off in the Z direction. At the same time, the utility model replaces the existing glue fixing method, simplifies the lens fixing operation process, and improves the assembly efficiency. The utility model provides a projector with the fixing assembly.

[0056] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A lens fixing assembly, characterized in that: include A fixing seat, having a mounting hole for mounting the lens, wherein a supporting surface for supporting the back of the lens is provided in the mounting hole; At least two clamping members are arranged around the mounting hole, and the clamping members have a clamping portion and a supporting portion; During the process of installing the lens into the mounting hole, the clamping part of the clamping member is squeezed to cause the supporting part to bend elastically; and after the back side of the lens abuts against the supporting surface, the supporting part is elastically recovered; the clamping part generates a clamping force on the lens in at least a downward direction.

2. The lens fixing assembly according to claim 1, characterized in that: The inner wall of the mounting hole of the fixing seat forms a positioning annular surface; the positioning annular surface is configured to cooperate with the outer side surface of the lens to constrain the lens in the radial direction of the mounting hole and / or limit the concentricity of the lens and the mounting hole.

3. The lens fixing assembly according to claim 2, characterized in that: The clamping portion protrudes toward the center direction of the mounting hole relative to the supporting portion. After the lens is installed in the mounting hole, a gap is formed between the supporting portion and the outer side surface of the lens.

4. The lens fixing assembly according to claim 1, characterized in that: The clamping portion has a pressing surface matched with the lens.

5. The lens fixing assembly according to claim 4, characterized in that: The pressing surface is in the shape of a spherical arc and has the same radius as the spherical arc surface of the lens; the pressing surface is configured to fit with the lens in a surface contact manner to generate a pressing force directed toward the center of the spherical arc surface of the lens.

6. The lens fixing assembly according to claim 1, characterized in that: The cross-section of the clamping portion is an arc shape.

7. The lens fixing assembly according to claim 1, characterized in that: The clamping portion is provided with an inclined introduction surface.

8. The lens fixing assembly according to claim 7, characterized in that: The clamping portion is also provided with a vertical guide surface.

9. The lens fixing assembly according to claim 1, characterized in that: The material of the clamping piece is plastic, rubber or silicone.

10. A projector, characterized in that: The invention comprises a lens fixing assembly as claimed in any one of claims 1 to 9; the projector is a micro-projector.

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