CN217787581U - Lens structure and projection device - Google Patents

Abstract

The utility model relates to a camera lens structure and projection arrangement. The lens structure comprises a radiator and a lens body. The lens body comprises a front group component and a rear group component, the radiator comprises a connecting part and a radiating part connected with the connecting part, the front group component is arranged on one side of the connecting part, the rear group component is arranged on the other side of the connecting part, and the front group component and the rear group component are respectively connected with the connecting part. The connecting part is provided with a light through hole, and the front group component, the light through hole and the rear group component are arranged oppositely. Therefore, heat generated inside the front group component and the rear group component can be conducted to the radiator, the radiator radiates the front group component and the rear group component, so that the inside and the outside of the lens structure reach thermal balance as soon as possible, the temperature difference between the lens structure and the external environment is reduced, the lens inside the lens structure is prevented from being deviated due to expansion caused by heat and contraction caused by cold, and the problem of thermal defocusing is solved.

Description

Lens structure and projection device

Technical Field

The utility model relates to the field of optical technology, especially, relate to a lens structure and projection arrangement.

Background

The lens structure can be applied to optical equipment such as a projection device, when the lens structure works, light passes through the lens and other structural parts inside the lens structure, light energy can be converted into heat energy at the moment, and the heat energy is absorbed by the lens structure, so that the lens and other structural parts inside the lens structure have small deviation due to expansion with heat and contraction with cold to influence the focal length, and further thermal defocusing is generated, and an original clear picture becomes fuzzy due to the thermal defocusing.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a lens structure and a projection apparatus that can solve the thermal defocus problem.

A lens structure comprises a radiator and a lens body, wherein the lens body comprises a front group component and a rear group component, the radiator comprises a connecting part and a radiating part connected with the connecting part, the front group component is arranged on one side of the connecting part, the rear group component is arranged on the other side of the connecting part, the front group component and the rear group component are respectively connected with the connecting part, the connecting part is provided with a light through hole, and the front group component, the light through hole and the rear group component are oppositely arranged.

In one embodiment, the front group assembly further comprises a first lens barrel and a front group lens, wherein the front group lens is arranged in the first lens barrel; the first lens cone comprises a first cylinder body and a first lens cone flange, and the first lens cone flange is connected to the light inlet end of the first cylinder body; the connecting part comprises a connecting flange which is connected and matched with the first lens barrel flange.

In one embodiment, the connecting flange is provided with the light through hole, a first connecting ring is convexly arranged on one side of the connecting flange facing the first lens barrel, and the first connecting ring is arranged around the light through hole; a second connecting ring is convexly arranged on one side, facing the radiator, of the first lens cone flange, the second connecting ring is arranged around the periphery of the first lens cone flange, the second connecting ring is sleeved outside the first connecting ring, the inner peripheral surface of the second connecting ring is in contact fit with the outer peripheral surface of the first connecting ring, and one end, far away from the first lens cone flange, of the second connecting ring is in contact fit with the connecting flange.

In one embodiment, the rear group component includes a rear group lens and a second lens barrel coaxially disposed with the first lens barrel, the second lens barrel includes a second cylinder and a second lens barrel flange, the second lens barrel flange is connected to the light-emitting end of the second lens barrel, the rear group lens is disposed in the second lens barrel, and the second lens barrel flange is connected and matched with the connecting flange.

In one embodiment, a third connecting ring is convexly arranged on one side of the second lens barrel flange facing the heat sink, the third connecting ring is inserted into the light through hole, the outer peripheral surface of the third connecting ring is in contact fit with the hole wall of the light through hole, and one side of the second lens barrel flange facing the heat sink is in contact fit with the connecting flange.

In one embodiment, the first barrel located on the side of the first barrel flange facing the heat sink passes through the light through hole and extends at least into the third connecting ring.

In one embodiment, a limiting ring is convexly arranged on one side of the connecting flange facing the rear group assembly, the limiting ring and the connecting flange are encircled to form a limiting groove, and the second lens barrel flange is arranged in the limiting groove.

In one embodiment, the connecting flange is provided with a first connecting hole, the first lens cone flange is provided with a second connecting hole, the second lens cone flange is provided with a third connecting hole, the first connecting hole, the second connecting hole and the third connecting hole are oppositely arranged, and a connecting piece is arranged in a penetrating manner and is used for fixedly connecting the first lens cone flange, the connecting flange and the second lens cone flange.

In one embodiment, the heat dissipation part comprises a plurality of heat dissipation fins arranged at intervals, and an airflow channel is formed between every two adjacent heat dissipation fins.

A projection device comprises the lens structure.

In the lens structure and the projection device, the radiator comprises the connecting part and the radiating part connected with the connecting part, and the front group component and the rear group component are respectively connected at two opposite sides of the connecting part, so that heat generated inside the front group component and the rear group component can be conducted to the radiator, and the radiator radiates the front group component and the rear group component to ensure that the inside and the outside of the lens structure reach thermal balance, reduce the temperature difference between the inside of the lens structure and the external environment, avoid the deflection of lenses of the lens structure caused by thermal expansion and cold contraction, and further solve the problem of thermal defocusing.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lens structure according to an embodiment of the present invention;

fig. 2 is a sectional view of the lens structure shown in fig. 1;

FIG. 3 is an exploded view of the lens structure shown in FIG. 1;

fig. 4 is a schematic structural diagram of a heat sink of the lens structure shown in fig. 1.

The reference numbers indicate: 10. a lens body; 11. a front group component; 111. a first lens barrel; 1111. a first cylinder; 1112. a first barrel flange; 1113. a second connection ring; 1114. a second connection hole; 112. a front group of lenses; 12. a rear group component; 121. a second barrel; 1211. a second cylinder; 1212. a second barrel flange; 1213. a third connecting ring; 1214. a third connecting hole; 122. a rear group of lenses; 20. a heat sink; 21. a connecting portion; 211. a connecting flange; 2111. a light through hole; 2112. a first connecting ring; 2113. a limiting ring; 2114. a limiting groove; 2115. a first connection hole; 22. a heat dissipating section; 221. and (4) radiating fins.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 3, a lens structure according to an embodiment of the present invention includes a heat sink 20 and a lens body 10. The lens body 10 includes a front group component 11 and a rear group component 12, the heat sink 20 includes a connecting portion 21 and a heat sink portion 22 connected to the connecting portion 21, the front group component 11 is disposed on one side of the connecting portion 21, the rear group component 12 is disposed on the other side of the connecting portion 21, and the front group component 11 and the rear group component 12 are respectively connected to the connecting portion 21. The connecting portion 21 has a light-passing hole 2111, and the front group component 11, the light-passing hole 2111 and the rear group component 12 are disposed opposite to each other.

It should be noted that the lens structure may be a projection lens of a projection apparatus. When the projection device works, light rays sequentially pass through the rear group component 12, the light through hole 2111 and the front group component 11 and then are emitted out of the front group component 11 to the projection curtain to form a projection picture. Of course, in other embodiments, the lens structure may be applied to other apparatuses, and is not limited thereto.

Specifically, the lens structure further includes a housing, the heat sink 20 and the lens body 10 are disposed in the housing, and the heat sink 20 is fixed in the housing. When the lens structure is a projection lens of a projection apparatus, the heat sink 20 can be fixed on the optical engine.

In the lens structure, the heat sink 20 includes the connecting portion 21 and the heat dissipating portion 22 connected to the connecting portion 21, the front group component 11 and the rear group component 12 are respectively connected to two opposite sides of the connecting portion 21, so that the heat generated inside the front group component 11 and the rear group component 12 can be conducted to the heat sink 20, the heat sink 20 dissipates the heat of the front group component 11 and the rear group component 12, so as to balance the heat inside and outside the lens structure, reduce the temperature difference between the inside of the lens structure and the external environment, and avoid the lens of the lens structure from being shifted due to thermal expansion and contraction, thereby solving the problem of thermal defocusing.

In one embodiment, referring to fig. 1 and 3, front group assembly 11 includes a first barrel 111, first barrel 111 includes a first barrel 1111 and a first barrel flange 1112, and first barrel flange 1112 is connected to a light input end of first barrel 1111. Specifically, the first barrel flange 1112 is disposed coaxially with the light incident end of the first barrel 1111. The connecting portion 21 includes a connecting flange 211, and the connecting flange 211 is connected and matched with the first barrel flange 1112. Thus, the first barrel flange 1112 is matched with the connecting flange 211 to connect the first barrel 111 and the heat sink 20, so as to improve the connection firmness between the first barrel 111 and the heat sink 20, and facilitate the detachment of the first barrel 111 and the heat sink 20.

It should be noted that, when the lens structure is applied to a projection apparatus, the light incident end of the first barrel 111 is an end of the first barrel 111 close to the optical engine.

Specifically, the front group assembly 11 further includes a front group lens 112, and the front group lens 112 is disposed in the first barrel 111.

Further, referring to fig. 2 and 3, the connection flange 211 is provided with a light passing hole 2111. A first connection ring 2112 protrudes from the connection flange 211 toward the first barrel 111, and the first connection ring 2112 is disposed around the light passing hole 2111. A second connection ring 1113 is convexly disposed on a side of the first barrel flange 1112 facing the heat sink 20, the second connection ring 1113 is disposed around a periphery of the first barrel flange 1112, the second connection ring 1113 is sleeved outside the first connection ring 2112, an inner circumferential surface of the second connection ring 1113 is in contact fit with an outer circumferential surface of the first connection ring 2112, and an end of the second connection ring 1113 away from the first barrel flange 1112 is in contact fit with the connection flange 211. In this way, since the inner circumferential surface of the second connection ring 1113 is in contact fit with the outer circumferential surface of the first connection ring 2112, and the second connection ring 1113 is in contact fit with the connection flange 211, the contact area between the first barrel 111 and the heat sink 20 can be increased, so that the heat on the first barrel 111 can be quickly conducted to the heat sink 20, the heat dissipation efficiency is improved, and the firmness of connection between the first barrel 111 and the heat sink 20 is also increased.

In one embodiment, referring to fig. 2 and 3, the back group assembly 12 includes a back group lens 122 and a second barrel 121 disposed coaxially with the first barrel 111. The second barrel 121 includes a second barrel 1211 and a second barrel flange 1212, and the second barrel flange 1212 is connected to the light exit end of the second barrel 1211. Specifically, the second barrel flange 1212 is disposed coaxially with the light exit end of the second barrel 1211. The rear group lens 122 is disposed in the second barrel 121, and the second barrel flange 1212 is connected to and engaged with the connecting flange 211. Thus, the second barrel flange 1212 is connected and matched with the connecting flange 211, so as to realize the connection between the rear group component 12 and the heat sink 20, improve the firmness of the connection between the rear group component 12 and the heat sink 20, and facilitate the detachment of the rear group component 12 and the heat sink 20.

Optionally, the rear group lens 122 may be disposed at the light-entering end of the second barrel 121. Referring to fig. 3, the light-emitting end of the second barrel 121 is an end of the second barrel 121 close to the first barrel 111, and the light-entering end of the second barrel 121 is an end of the second barrel 121 far from the first barrel 111.

Further, referring to fig. 2 and 3, a third connection ring 1213 is convexly provided on a side of the second barrel flange 1212 facing the heat sink 20, the third connection ring 1213 is inserted into the light passing hole 2111, an outer peripheral surface of the third connection ring 1213 is in contact fit with a hole wall of the light passing hole 2111, and a side of the second barrel flange 1212 facing the heat sink 20 is in contact fit with the connection flange 211. Thus, since the outer peripheral surface of the third connection ring 1213 is in contact fit with the hole wall of the light-passing hole 2111, and one side of the second barrel flange 1212 facing the heat sink 20 is in contact fit with the connection flange 211, the contact area between the second barrel 121 and the heat sink 20 can be increased, so that the heat on the rear group component 12 can be quickly conducted to the heat sink 20, the heat dissipation efficiency of the rear group component 12 is improved, and the firmness of connection between the rear group component 12 and the heat sink 20 is also increased.

Specifically, referring to fig. 2, the first barrel 1111 located on the side of the first barrel flange 1112 facing the heat sink 20 passes through the light passing hole 2111 and extends at least into the third connection ring 1213.

Further, referring to fig. 2, 3 and 4, a limiting ring 2113 is convexly disposed on one side of the connecting flange 211 facing the rear group assembly 12, the limiting ring 2113 and the connecting flange 211 enclose a limiting groove 2114, and the second barrel flange 1212 is disposed in the limiting groove 2114. Specifically, the retainer ring 2113 is disposed coaxially with the first connection ring 2112, and the diameter of the retainer ring 2113 is larger than the diameter of the first connection ring 2112. Thus, during installation, the second barrel flange 1212 is disposed in the limiting groove 2114, and the limiting ring 2113 limits the second barrel flange 1212, so as to prevent the second barrel flange 1212 from moving along the radial direction thereof, thereby firmly installing the rear group member 12 in the heat sink 20.

In one embodiment, referring to fig. 2 and 3, the connection flange 211 is provided with a first connection hole 2115, the first barrel flange 1112 is provided with a second connection hole 1114, and the second barrel flange 1212 is provided with a third connection hole 1214. The first connection hole 2115, the second connection hole 1114 and the third connection hole 1214 are oppositely arranged, and a connection member is arranged in the first connection hole 2115, the second connection hole 1114 and the third connection hole 1214 in a penetrating manner and is used for fixedly connecting the first lens barrel flange 1112, the connection flange 211 and the second lens barrel flange 1212. During installation, the connecting members are inserted into the first connecting holes 2115, the second connecting holes 1114 and the third connecting holes 1214, and the first barrel flange 1112, the connecting flange 211 and the second barrel flange 1212 can be fixedly connected by the connecting members, so that the front group assembly 11, the heat sink 20 and the rear group assembly 12 are fixedly connected.

In one embodiment, referring to fig. 3, the heat dissipation portion 22 includes a plurality of heat dissipation fins 221 arranged at intervals, and an airflow channel is formed between two adjacent heat dissipation fins 221. Therefore, the heat dissipation fins 221 have a large contact area with air, so that the heat exchange area in contact with flowing air can be increased, and the heat exchange efficiency is improved.

Optionally, the number of the heat dissipation portions 22 is at least one. When the number of the heat dissipation portions 22 is plural, the plural heat dissipation portions 22 may be provided on different sides of the connecting portion 21. It is understood that the greater the number of heat dissipation portions, the higher the heat dissipation efficiency of the front group element 11 and the rear group element 12, and the number of heat dissipation portions 22 and the number of heat dissipation fins 221 in each heat dissipation portion 22 may be set according to the actual heat generation amount of the front group element 11 and the rear group element 12.

The utility model relates to a projection arrangement, including the camera lens structure of any one of the above-mentioned embodiments.

In the above projection apparatus, the heat sink 20 includes the connecting portion 21 and the heat dissipating portion 22 connected to the connecting portion 21, the front group component 11 and the rear group component 12 are respectively connected to two opposite sides of the connecting portion 21, so that the heat generated inside the front group component 11 and the rear group component 12 can be conducted to the heat sink 20, the heat sink 20 dissipates the heat of the front group component 11 and the rear group component 12, so as to balance the heat inside and outside of the lens structure, reduce the temperature difference between the inside of the lens structure and the external environment, and avoid the lens of the lens structure from shifting due to thermal expansion and contraction, thereby solving the problem of thermal defocus.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The lens structure is characterized by comprising a radiator and a lens body, wherein the lens body comprises a front group component and a rear group component, the radiator comprises a connecting part and a radiating part connected with the connecting part, the front group component is arranged on one side of the connecting part, the rear group component is arranged on the other side of the connecting part, the front group component and the rear group component are respectively connected with the connecting part, the connecting part is provided with a light through hole, and the front group component, the light through hole and the rear group component are oppositely arranged.

2. The lens structure according to claim 1, wherein the front group assembly includes a first barrel and a front group lens, the front group lens is disposed in the first barrel;

the first lens cone comprises a first cylinder body and a first lens cone flange, and the first lens cone flange is connected to the light inlet end of the first cylinder body; the connecting part comprises a connecting flange which is connected and matched with the first lens barrel flange.

3. The lens structure according to claim 2, wherein the connecting flange is provided with the light through hole, and a first connecting ring is convexly provided on a side of the connecting flange facing the first lens barrel and surrounds the light through hole;

a second connecting ring is convexly arranged on one side, facing the heat radiator, of the first lens cone flange, the second connecting ring is arranged around the periphery of the first lens cone flange, the second connecting ring is sleeved outside the first connecting ring, the inner peripheral surface of the second connecting ring is in contact fit with the outer peripheral surface of the first connecting ring, and one end, far away from the first lens cone flange, of the second connecting ring is in contact fit with the connecting flange.

4. The lens structure according to claim 3, wherein the rear group member includes a rear group lens and a second barrel coaxially disposed with the first barrel, the second barrel includes a second barrel and a second barrel flange, the second barrel flange is connected to the light-emitting end of the second barrel, the rear group lens is disposed in the second barrel, and the second barrel flange is connected and matched with the connecting flange.

5. The lens structure as claimed in claim 4, wherein a third connecting ring is protruded from a side of the second barrel flange facing the heat sink, the third connecting ring is inserted into the light hole, an outer peripheral surface of the third connecting ring is in contact fit with a wall of the light hole, and a side of the second barrel flange facing the heat sink is in contact fit with the connecting flange.

6. The lens structure according to claim 5, wherein the first barrel on a side of the first barrel flange facing the heat sink passes through the light passing hole and extends at least into the third connecting ring.

7. The lens structure according to claim 4, wherein a limiting ring is convexly disposed on a side of the connecting flange facing the rear group assembly, the limiting ring and the connecting flange enclose a limiting groove, and the second barrel flange is disposed in the limiting groove.

8. The lens structure according to claim 4, wherein the connecting flange has a first connecting hole, the first barrel flange has a second connecting hole, the second barrel flange has a third connecting hole, and the first connecting hole, the second connecting hole and the third connecting hole are disposed opposite to each other and penetrated by a connecting member for fixedly connecting the first barrel flange, the connecting flange and the second barrel flange.

9. The lens structure according to any one of claims 1 to 8, wherein the heat dissipation portion includes a plurality of heat dissipation fins arranged at intervals, and an airflow channel is formed between two adjacent heat dissipation fins.

10. A projection apparatus comprising the lens structure according to any one of claims 1 to 9.

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