CN215986866U - Projection device - Google Patents

Abstract

A projection device comprises a light source module, a light valve module, a shell and a projection lens module. The light source module provides an illumination beam. The light valve module is located on the transmission path of the illumination beam and converts the illumination beam into an image beam. The housing accommodates the light source module, the light valve module, and the projection lens module. The projection lens module is located on the transmission path of the image light beam and projects the image light beam to the outside of the projection device. The projection lens module comprises a bearing piece, a projection lens, a locking accessory, an elastic piece and a fixing pin. The bearing piece is fixed on the shell. The projection lens is provided with a fixed part. The locking accessory passes through the fixing part and is locked on the bearing part, so that the fixing part is limited between the locking accessory and the bearing part, and the tail end of the locking accessory protrudes out of the bearing part. The end has a through hole. The elastic piece is arranged between the bearing piece and the fixing part. The fixing pin passes through the through hole to limit the moving distance of the fixing part to the front end of the locking accessory. The projection device has good image quality.

Description

Projection device

Technical Field

The present invention relates to a projection apparatus having a projection lens, and more particularly, to a projection apparatus having a projection lens adjustable to a fixed position.

Background

With the development of science and technology, projection apparatuses having a projection lens are widely used in daily life. Generally speaking, because an assembly tolerance is generated between the projection lens and the optical engine housing, the projection lens is easy to make the light transmission path generate unbalance or asymmetry, that is, the focal length of the projection lens is not symmetrical, so that the projection image generates blur, therefore, a solution is: a quasi-direction (Boright) adjusting structure is additionally arranged on the projection lens so as to meet the requirements of optimizing the balance of a projection picture and enabling the projection picture to be clear.

The background section is only used to help the understanding of the present invention, and therefore the disclosure in the background section may include some known techniques which are not known to those skilled in the art. The statements in the "background" section do not represent that matter or the problems which may be solved by one or more embodiments of the present invention, but are known or appreciated by those skilled in the art before filing the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a projection device, which can firmly fix a projection lens.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

To achieve one or a part of or all of the above or other objects, the present invention provides a projection apparatus, which includes a light source module, a light valve module, a housing and a projection lens module. The light source module is used for providing an illumination light beam. The light valve module is located on the transmission path of the illumination beam and is used for converting the illumination beam into an image beam. The shell is used for accommodating the light source module, the light valve module and the projection lens module. The projection lens module is located on the transmission path of the image light beam and is used for projecting the image light beam to the outside of the projection device. The projection lens module comprises a bearing piece, a projection lens, a locking accessory, an elastic piece and a fixing pin. The bearing piece is fixed in the shell. The projection lens is provided with a fixed part. The locking accessory is used for passing through the fixing part and being locked and attached to the bearing part, so that the fixing part is limited between the locking accessory and the bearing part, and the tail end of the locking accessory protrudes out of the bearing part. The end has a through hole. The elastic piece is arranged between the bearing piece and the fixing part and is used for pushing the fixing part to the front end of the locking accessory. The fixing pin passes through the through hole to limit the moving distance of the fixing part to the front end of the locking accessory.

Based on the above, the embodiments of the utility model have at least one of the following advantages or efficacies. In the projection device, the lock accessory can generate different displacement strokes relative to the bearing piece in the process of rotary screwing, so that the distance between the projection lens and the bearing piece can be finely adjusted, and the fixing pin passes through the tail end of the lock accessory, so that the lock accessory can be prevented from being separated from the bearing piece in the process of rotary screwing.

In order to make the aforementioned and other features and advantages of the utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view of a projection apparatus according to an embodiment of the utility model.

Fig. 2 is a schematic view of a projection lens module according to an embodiment of the utility model.

Fig. 3 is an exploded view of the projection lens module of fig. 2.

Fig. 4 is a front view of the projection lens module of fig. 2.

Fig. 5A is a schematic cross-sectional view of the projection lens module of fig. 2.

Fig. 5B is a partially enlarged schematic view of the projection lens module of fig. 5A.

Fig. 6A is a partial rear view of the projection lens module of fig. 5B.

Fig. 6B is another schematic view of the projection lens module of fig. 6A.

Detailed Description

The foregoing and other features and advantages of the utility model will be apparent from the following, more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic view of a projection apparatus according to an embodiment of the utility model. Referring to fig. 1, a projection apparatus (projector)10 of the present embodiment includes a light source module 50, a light valve module (light valve module)60, a housing 80, and a projection lens module (projection lens module) 100. The light source module 50 is used for providing an illumination beam LB. The light valve module 60 is disposed on a transmission path of the illumination beam LB and is configured to convert the illumination beam LB into an image beam LI. The housing 80 is used to accommodate the light source module 50, the light valve module 60, and the projection lens module 100. The projection lens module 100 is disposed on a transmission path of the image light beam LI, and is configured to project the image light beam LI out of the projection apparatus 10 to a projection target (not shown), such as a screen or a wall.

For example, in the present embodiment, the light source module 50 is formed by combining a plurality of light emitting elements, a wavelength conversion element, a light homogenizing element, a filter element and a plurality of light splitting and combining elements, and is configured to provide light with different wavelengths as a source of the image light beam. However, the present invention is not limited to the type or form of the light source module 50 in the projection apparatus 10, and the detailed structure and implementation thereof can be taught, suggested and described sufficiently by the general knowledge in the art, and therefore, the detailed description thereof is omitted.

In some embodiments, the light valve module 60 is a reflective light modulator such as a Liquid Crystal On Silicon (LCoS) panel, a Digital Micro-mirror Device (DMD), etc., and a control circuit thereof. In some embodiments, the light valve module 60 may also be a transmissive light modulator of a transmissive Liquid Crystal Panel (transmissive Liquid Crystal Panel) and its control circuit. The present invention is not limited by the type and kind of the optical valve module 60. The detailed steps and embodiments of the method for converting the illumination beam LB into the image beam LI by the light valve module 60 can be obtained by conventional knowledge in the art, and therefore, the detailed description thereof is omitted here.

Fig. 2 is a schematic view of a projection lens module according to an embodiment of the utility model. Fig. 3 is an exploded view of the projection lens module of fig. 2. Referring to fig. 2 and 3, the projection lens module 100 includes a carrier 110, a projection lens (projection lenses) 120, a locking member 130, an elastic member 140, and a fixing pin 150. In the present embodiment, the carrier 110 is fixed to the housing 80 (fig. 1). The projection lens 120 has a fixing portion 121. The locking accessory 130 can be locked to the carrier 110 through the fixing portion 121 having a through hole, so that the fixing portion 121 is limited between the locking accessory 130 and the carrier 110. Here, the elastic member 140 is, for example, a spring, and the locking member 130 is, for example, a hexagon socket head cap screw, but not limited thereto, and other kinds of screws may be applied.

For example, the projection lens 120 includes a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses including a biconcave lens, a biconvex lens, a meniscus lens, a convex-concave lens, a plano-convex lens, and a plano-concave lens, to project the image beam LI from the light valve module 60 to a projection target. The type and type of the projection lens 120 are not limited in the present invention.

Fig. 4 is a front view of the projection lens module of fig. 2. Fig. 4 is a schematic diagram of the image light beam L1 on the transmission path, viewed from the outside of the projection apparatus 10 toward the projection lens. Referring to fig. 4, the carrier 110 surrounds the projection lens 120 and forms a space for the projection lens 120 to be placed, that is, the projection lens 120 can be disposed on the carrier 110. In the present embodiment, the number of the locking accessories 130 is three, and three points are aligned, that is, the projection lens 120 has three adjustment points, so that the projection lens 120 is well fixed to the carrier 110. In other embodiments, the number of the locking accessories may be appropriately adjusted, and the present invention is not limited thereto.

Fig. 5A is a schematic cross-sectional view of the projection lens module of fig. 2. Fig. 5B is a partially enlarged schematic view of the projection lens module of fig. 5A. In fig. 5B, the X direction, the Y direction, and the Z direction are marked to show the arrangement relationship of the respective members in the drawing, and the X direction, the Y direction, and the Z direction intersect with each other, but not limited thereto.

In the embodiment, the carrier 110 has a screw hole 111, and the locking member 130 can pass through the fixing portion 121 to be locked with the screw hole 111. The end 130a of the locking attachment 130 protrudes from the carrier 110, and the end 130a of the locking attachment 130 has a through hole H1. In the embodiment, the fixing pin 150 passes through the through hole H1, so that the lock attachment 130 is prevented from being separated from the carrier 110 during the screwing process, and the distance that the fixing portion 121 moves to the front end 130b of the lock attachment 130 is further limited. The actual position of the through hole H1 can be adjusted appropriately according to the displacement stroke of the lock attachment 130.

In the present embodiment, the number of the fixing portions 121 and the number of the elastic members 140 correspond to the number of the locking attachments 130. Specifically, the elastic element 140 is disposed between the supporting element 110 and the fixing portion 121, and is in a compressed state to push the fixing portion 121 toward the front end 130b of the locking element 130, so that the supporting element 110 and the fixing portion 121 are tightly fitted.

With the above arrangement, the lock attachment 130 can be moved in the X direction by rotating the adjustment lock attachment 130. For example, when the locking member 130 rotates clockwise, the locking member 130 moves in the positive X direction, and pushes the fixing portion 121 to move in the positive X direction. When the locking attachment 130 rotates counterclockwise, the locking attachment 130 moves in the negative X direction, the compression state of the elastic element 140 is released and applies a force in the negative X direction, the fixing portion 121 moves in the negative X direction under the action of the elastic element 140, and the fixing pin 150 passes through the end 130a of the locking attachment 130, so that the locking attachment 130 is prevented from being disengaged from the bearing member 110 during the rotation screwing process. Therefore, the projection lens module 100 of the embodiment has a simplified adjustment structure, and the fixing portion 121 of the projection lens 120 can be easily moved in the X direction by rotating the locking accessory 130, so as to achieve the function of adjusting the focal length of the projection lens 120.

In addition, in the embodiment, the projection lens module 100 further includes a gasket 160 located between the locking member 130 and the fixing portion 121, which can prevent the locking member 130 and the fixing portion 121 from directly rubbing to generate metal chips.

Fig. 6A is a partial rear view of the projection lens module of fig. 5B. Fig. 6B is another schematic view of the projection lens module of fig. 6A. In the present embodiment, the fixing pin 150 is, for example, a cotter pin, and has a bent portion 151 and a linear portion 152. The bent portion 151 wraps around a portion of the outer edge 1301 of the end 130a of the locking attachment 130, and the straight portion 152 passes through the through hole H1. The length L1 of the linear portion 152 of the fixing pin 150 is greater than the diameter D1 of the threaded hole 111 of the carrier 110 to prevent the locking member 130 from moving in the positive X direction and separating from the carrier 110. In other embodiments, a lock nut or a blind nut may be used to lock the end 130a of the locking member 130 to prevent the locking member 130 from being disengaged from the carrier 110.

The fixing pin 150 of the embodiment is an elastic body, and the assembling method thereof is, for example, to expand the opening of the fixing pin 150 to be larger than the radius of the locking attachment 130, and then to insert the fixing pin 150 into the through hole H1 of the locking attachment 130, the fixing pin 150 will rebound to its original shape by its own elasticity to buckle the end 130a of the locking attachment 130, thereby achieving the stopping effect of the locking attachment 130.

In this embodiment, the end 130a of the locking attachment 130 is partially cut to have a non-circular outer edge 1301 in cross-section to facilitate subsequent drilling (e.g., through hole H1) of the locking attachment 130. Specifically, the non-circular outer edge 1301 has an arc segment 131 and a straight segment 132. The straight section 132 of the locking attachment 130 is perpendicular to the direction of extension of the through hole H1. In the present embodiment, the central angle subtended by the arc segments 131 is greater than 180 °. That is, the cross-sectional area of the end 130a of the locking attachment 130 is at least half larger than the cross-sectional area of the screw hole 111 after cutting, so as to prevent the locking attachment 130 from moving in the screw hole 111 and losing the locking function with the screw hole 111.

In detail, the carrier 110 has a retaining wall 112 extending away from the projection lens 120. The retaining wall 112 protrudes from the periphery of the bottom surface 114. Lock attachment 130 locks to bottom surface 114. The fixing pins 150 are located in the retaining wall 112 and do not protrude from the retaining wall, so as to prevent the fixing pins 150 from interfering with the structure of the carrier 110.

In summary, the embodiments of the utility model have at least one of the following advantages or effects. In the projection device, the lock accessory can generate different displacement strokes relative to the bearing piece in the process of rotary screwing, and the elastic piece is matched in a compressed state to push the fixing part timely, so that the distance between the projection lens and the bearing piece can be finely adjusted, and the requirements of optimizing picture balance and making a projection picture clear are met. In some embodiments, the locking attachment may be prevented from being disengaged from the carrier during the screwing process by a fixing pin passing through a through hole in the end of the locking attachment protruding from the carrier. In some embodiments, a lock nut or blind nut may also be used to lock the end of the locking attachment to prevent the locking attachment from disengaging from the carrier. Therefore, the projection lens module of the utility model has a simplified adjusting structure, the fixing part of the projection lens can be easily moved in the front and back directions through rotating the locking accessory, so as to achieve the function of adjusting the focal length of the projection lens, and special tools can be omitted during adjustment, thereby being very convenient.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and the simple equivalent changes and modifications made according to the claims and the disclosure of the present invention are still included in the scope of the present invention. It is not necessary for any embodiment or claim of the utility model to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title (the title of the utility model) are provided for assisting the search of the patent document and are not intended to limit the scope of the right of the utility model.

Description of reference numerals:

10 projection device

50 light source module

60 light valve module

80 casing

100 projection lens module

110 bearing part

111 screw hole

112 retaining wall

114 bottom surface

120 projection lens

121, fixed part

130 lock accessory

1301 outer margin

130a terminal end

130b front end

131 arc segment

132 straight line segment

140 elastic member

150 fixing pin

151 bent portion

152 linear part

160: pad

D1 diameter

H1 through hole

L1 length

LB illuminating light Beam

LI image light beam

X, Y, Z, direction.

Claims (10)

1. A projection device, comprising a light source module, a light valve module, a housing and a projection lens module, wherein:

the light source module is used for providing an illumination light beam;

the light valve module is positioned on the transmission path of the illumination light beam and is used for converting the illumination light beam into an image light beam;

the shell is used for accommodating the light source module, the light valve module and the projection lens module; and

the projection lens module is located on a transmission path of the image light beam and used for projecting the image light beam to the outside of the projection device, wherein the projection lens module comprises a bearing part, a projection lens, a locking accessory, an elastic part and a fixing pin, wherein:

the bearing piece is fixed on the shell;

the projection lens is provided with a fixed part;

the locking accessory is used for passing through the fixing part and being locked and attached to the bearing part, so that the fixing part is limited between the locking accessory and the bearing part, wherein the tail end of the locking accessory protrudes out of the bearing part, and the tail end is provided with a through hole;

the elastic piece is arranged between the bearing piece and the fixing part and used for pushing the fixing part to the front end of the locking accessory; and

the fixing pin passes through the through hole to limit the distance of the fixing part moving towards the front end of the lock accessory.

2. The projection apparatus as claimed in claim 1, wherein the through hole extends in a direction perpendicular to a direction in which the fixing portion pushes against the locking member.

3. The projection device of claim 1, wherein the retaining pin has a curved portion that wraps around a portion of an outer edge of the distal end of the lock attachment and a straight portion that passes through the through hole.

4. The projection device of claim 3, wherein the bearing member has a threaded hole for interlocking with the locking member, and the length of the linear portion of the fixing pin is greater than the diameter of the threaded hole.

5. The projection device of claim 1, wherein the end of the lock attachment has a non-circular outer edge.

6. The projection device of claim 5, wherein the non-circular outer edge has an arc segment subtending a central angle greater than 180 ° and a straight segment.

7. The projection device of claim 6, wherein the straight section of the lock attachment is perpendicular to an extension direction of the through hole.

8. The projection apparatus according to claim 1, wherein the carrier has a retaining wall extending away from the projection lens, and the fixing pins are located in the retaining wall and do not protrude from the retaining wall.

9. The projection device of claim 1, wherein the projection lens module further comprises a gasket positioned between the lock attachment and the retainer.

10. The projection apparatus according to claim 1, wherein the number of the fixing portion, the locking member, the elastic member and the fixing pin is three.

Images