CN117250815A - Projection lens and projection equipment - Google Patents

Abstract

This application discloses a projection lens and projection equipment. The projection lens includes a first lens barrel, a second lens barrel and a third lens barrel. A first lens group is provided in the first lens barrel. The first lens The second lens group has a first optical axis; a second lens group is provided in the second lens barrel, the second lens group has a second optical axis, and a predetermined shape is formed between the first optical axis and the second optical axis. angle; light passes through the second lens group and the first lens group and emerges from the first lens barrel; the third lens barrel is connected to the first lens barrel, and the third lens barrel Rotatingly connected to the second lens barrel, the third lens barrel can drive the first lens barrel to rotate relative to the second lens barrel.

Description

Projection lens and projection equipment

Technical field

The present application relates to the technical field of optical products, and more specifically, to a projection lens and projection equipment.

Background technique

With the vigorous development of science and technology, projection technology has become increasingly mature, and projection equipment is increasingly used in people's daily life and work.

Currently, the direction of images projected by many projection devices is fixed; that is, the lens of the projection device is relatively fixed relative to the entire projection device. If you encounter a situation where you need to change the projection direction of the picture, you need to move the entire projection equipment to achieve this; this brings a lot of inconvenience to the use of the projection equipment.

In view of this, it is necessary to propose a new technical solution to solve the above technical problems.

Contents of the invention

One purpose of this application is to provide a new technical solution for a projection lens and projection equipment.

According to a first aspect of the present application, a projection lens is provided, the projection lens comprising:

A first lens barrel, a first lens group is provided in the first lens barrel, and the first lens group has a first optical axis;

A second lens barrel, a second lens group is provided in the second lens barrel, the second lens group has a second optical axis, and a predetermined angle is formed between the first optical axis and the second optical axis. ;The light passes through the second lens group and the first lens group and emerges from the first lens barrel;

A third lens barrel. The third lens barrel is connected to the first lens barrel, and the third lens barrel is rotatably connected to the second lens barrel. The third lens barrel can drive the first lens barrel. The lens barrel rotates relative to the second lens barrel.

Optionally, one of the second lens barrel and the third lens barrel is provided with a sliding shaft, and the other is provided with a slideway. When the second lens barrel and the third lens barrel rotate relative to each other, In this case, the sliding shaft and the slide track slide relatively.

Optionally, the sliding shaft is provided on the outer wall of the second lens barrel, and the slideway is opened on the side wall of the third lens barrel; the third lens barrel is sleeved on the second lens barrel. outside the cylinder, and the sliding shaft passes through the slideway.

Optionally, there are at least two slideways, and at least two slideways are spaced apart along the axial direction of the second lens barrel; the number of the slide shafts is at least two, and the slide shafts are They are arranged in one-to-one correspondence with the slideways.

Optionally, at least two sliding shafts are evenly distributed around the central axis of the second lens barrel.

Optionally, the second lens barrel is provided with an accommodating groove, and an elastic limiter is installed in the accommodating groove, and the elastic limiter can elastically expand and contract along the axial direction of the second lens barrel;

A limiting groove is provided at the bottom of the connection between the third lens barrel and the second lens barrel, and the elastic limiting member can be partially accommodated in the limiting groove to allow the third lens barrel to connect with the second lens barrel. The lens barrels snap into each other.

Optionally, the elastic limiting member includes a spring and a limiting bead, one end of the spring is connected to the bottom of the receiving groove, and the other end is connected to the limiting bead; the spring can be along the second The lens barrel elastically expands and contracts in the axial direction. When the spring is in a natural state, the limiting bead is partially exposed in the receiving groove.

Optionally, the number of the limiting grooves is at least two.

Optionally, the projection lens further includes a reflector, the reflector is installed on the third lens barrel; the mirror direction of the reflector is at an acute angle relative to both the first optical axis and the second optical axis. angle;

The light passes through the second lens group, the reflecting mirror and the first lens group and emerges from the first lens barrel.

Optionally, the third lens barrel includes a first sub-lens barrel and a second sub-lens barrel, and the first sub-lens barrel is fixedly connected to the second sub-lens barrel;

One end of the first sub-lens barrel is connected to the first lens barrel, and the second sub-lens barrel is rotatably connected to the second lens barrel.

According to a second aspect of the present application, a projection device is provided, the projection device including the projection lens as described in the first aspect.

Using the projection lens provided by the embodiment of the present application, the projection direction of the projection image can be easily adjusted without moving the entire projection device. Especially for some fixedly installed and immovable projection equipment, it can solve the problem of difficulty in adjusting the projection direction of the projection screen.

Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Figure 1 shows a schematic structural diagram of a projection lens of the present application;

Figure 2 shows a schematic diagram of the overall structure of a projection lens according to the present application;

Figure 3 shows an exploded structural diagram of a projection lens of the present application;

Figure 4 shows a side structural schematic diagram of a projection lens of the present application;

Figure 5 shows a schematic cross-sectional structural diagram of a projection lens of the present application;

Figure 6 shows an enlarged schematic diagram of position A in Figure 5;

Figure 7 shows a partial structural diagram of a projection lens of the present application;

8a to 8c are schematic diagrams of the working state of a projection device according to the present application.

Explanation of reference symbols:

1. Projection lens; 100. Slide; 101. Sliding shaft; 102. Accommodating groove; 103. Limiting groove; 104. Screw; 11. First lens barrel; 110. First flange; 12. Second mirror Barrel; 120, mounting base; 13, third barrel; 130, second flange; 131, first sub-barrel; 1311, mounting plate; 132, second sub-barrel; 14, first lens group; 15. Second lens group; 16. Reflector; 17. Elastic limiter; 171. Spring; 172. Limiting bead;

2. Equipment body.

Detailed ways

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these examples do not limit the scope of the present application unless otherwise specifically stated.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application or its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered a part of the specification.

In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters refer to similar items in the following figures, so that once an item is defined in one figure, it does not need further discussion in subsequent figures.

Referring to Figures 1 to 8c, according to an embodiment of the present application, a projection lens 1 is provided. The projection lens includes a first lens barrel 11, a second lens barrel 12 and a third lens barrel 13. A first lens group 14 is provided in the first lens barrel 11, and the first lens group 14 has a first optical axis;

A second lens group 15 is provided in the second lens barrel 12. The second lens group 15 has a second optical axis, and a predetermined angle is formed between the first optical axis and the second optical axis; light rays Pass through the second lens group 15 and the first lens group 14 and emerge from the first lens barrel 11;

The third lens barrel 13 is connected to the first lens barrel 11 , and is rotatably connected to the second lens barrel 12 . The third lens barrel 13 can drive the first lens barrel 11 . The lens barrel 11 rotates relative to the second lens barrel 12 .

In the projection lens provided by the embodiment of the present application, the first lens group 14 and the second lens group 15 form an optical effect on the transmission of light; each of the first lens group 14 and the second lens group 15 can be modified according to actual application needs. The type and number of lenses included are designed, and the specific degree of the predetermined angle formed between the first optical axis and the second optical axis is designed.

For the projection lens provided in the embodiment of the present application, the light emerges from the first lens barrel 11 after passing through the optical effects of the second lens group 15 and the first lens group 14; that is, the first lens barrel 11 is the exit lens barrel of the light. When the direction of the picture projected by the projection device needs to be changed, there is no need to move the entire projection device, and only the third lens barrel 13 needs to drive the first lens barrel 11 to rotate relative to the second lens barrel 12 .

Referring to Figures 8a to 8c, in different states where the third lens barrel 13 drives the first lens barrel 11 to rotate relative to the second lens barrel 12, the projection direction L of the projected image can be leftward as shown in Figure 8a. states, the forward state as shown in Figure 8b, and the rightward state as shown in Figure 8c.

Therefore, using the projection lens provided by the embodiment of the present application, the projection direction of the projection image can be easily adjusted without moving the entire projection device. Especially for some fixedly installed and immovable projection equipment, it can solve the problem of difficulty in adjusting the projection direction of the projection screen.

Referring to Figures 2, 3, and 4, in one embodiment, one of the second lens barrel 12 and the third lens barrel 13 is provided with a sliding shaft 101, and the other is provided with a slideway. 100. When the second lens barrel 12 and the third lens barrel 13 rotate relative to each other, the sliding shaft 101 and the slideway 100 slide relative to each other.

In this specific example, the sliding shaft 101 and the sliding channel 100 cooperate with each other. When the second lens barrel 12 and the third lens barrel 13 rotate relative to each other, the sliding shaft 101 and the sliding channel 100 slide relative to each other, so that the second lens barrel 12 The relative rotation with the third lens barrel 13 is used to guide the second lens barrel 12 and the third lens barrel 13 from unnecessary deviation during rotation.

Referring to FIGS. 2 and 3 , in one embodiment, the sliding shaft 101 is provided on the outer wall of the second lens barrel 12 , and the slideway 100 is opened on the side wall of the third lens barrel 13 ; The third lens barrel 13 is set outside the second lens barrel 12, and the sliding shaft 101 is passed through the slideway 100.

In this specific example, the third lens barrel 13 is sleeved outside the second lens barrel 12 , and the sliding shaft 101 is arranged on the outer wall of the second lens barrel 12 . For example, the sliding shaft 101 is installed on the second lens barrel 12 through screws 104 . The outer wall of the lens barrel 12; the slide channel 100 is opened on the side wall of the third lens barrel 13; optionally, the slide channel 100 penetrates the side of the third lens barrel 13 in the thickness direction of the side wall of the third lens barrel 13 The sliding shaft 101 passes through the sliding channel 100, so that the sliding shaft 101 and the sliding channel 100 cooperate with each other to provide a more stable guiding effect.

Referring to FIGS. 2 to 4 , in one embodiment, at least two slideways 100 are provided, and at least two of the slideways 100 are spaced apart along the axial direction of the second lens barrel 12 ; The number of sliding shafts 101 is at least two, and the sliding shafts 101 are arranged in one-to-one correspondence with the slideways 100 .

In this specific example, at least two slideways 100 spaced along the axial direction of the second lens barrel 12 cooperate with the sliding shafts 101 arranged one-to-one, which can effectively prevent the second lens barrel 12 from colliding with the third lens barrel. 13. Shaking occurs during relative rotation, thereby improving the stability of adjusting the direction of the projected image.

Referring to FIGS. 2 to 4 , in one embodiment, at least two sliding shafts 101 are evenly distributed around the central axis of the second lens barrel 12 .

In a specific example, three sliding shafts 101 are provided, and the three sliding shafts 101 are distributed at 120° around the central axis of the second lens barrel 12 . Correspondingly, three slideways 100 are provided, and the centers of the three slideways 100 are also distributed at 120° around the central axis of the second lens barrel 12 , and the lengths of the three slideways 100 are equal, and the three slideways 100 are The projections in the axial direction of the second lens barrel 12 overlap each other, thereby ensuring that the relative rotation angle of the second lens barrel 12 and the third lens barrel 13 is not less than 180°.

Referring to Figures 5, 6, and 7, in one embodiment, the second lens barrel 12 is provided with a receiving groove 102, and an elastic limiter 17 is installed in the receiving groove 102. The elastic limiter The member 17 can elastically expand and contract along the axial direction of the second lens barrel 12;

A limiting groove 103 is defined at the bottom of the third lens barrel 13 connected to the second lens barrel 12 , and the elastic limiting member 17 can be partially accommodated in the limiting groove 103 so that the third lens barrel 13 and the second lens barrel 12 are engaged with each other.

In this specific example, when the second lens barrel 12 and the third lens barrel 13 rotate relatively to the position where the elastic limiting member 17 enters the limiting groove 103, the third lens barrel 13 and the second lens barrel 12 snap into each other. , so that the positions of the third lens barrel 13 and the second lens barrel 12 are relatively fixed, so that the user can find the best position.

For example, the number of limit slots 103 is three, and the three limit slots 103 respectively correspond to the -90 degree position in Figure 8a, the 0 degree position in Figure 8b, and the +90 degree position in Figure 8c; in this way, the three limit grooves 103 The slot 103 defines three optimal positions for user convenience.

When the third lens barrel 13 needs to be rotated again from the optimal position, the user needs to forcefully press the third lens barrel 13 along the axial direction of the second lens barrel 12 so that the elastic limiter 17 is disengaged from the limiter groove 103 , so that the third lens barrel 13 and the second lens barrel 12 are no longer locked with each other, and the third lens barrel 13 and the second lens barrel 12 can be relatively rotated.

Referring to FIG. 6 , in one embodiment, the elastic limiting member 17 includes a spring 171 and a limiting bead 172 . One end of the spring 171 is connected to the bottom of the receiving groove 102 , and the other end is connected to the limiting bead 172 . The positioning bead 172 is connected; the spring 171 can elastically expand and contract along the axial direction of the second lens barrel 12 . When the spring 171 is in a natural state, the positioning bead 172 is partially exposed in the accommodating groove 102 .

In this specific example, at a position outside the limiting groove 103, the bottom of the third lens barrel 13 abuts and presses the limiting bead 172 to compress the spring 171; when it reaches the limiting groove 103, the spring 171 stretches out, Under the elastic force of the spring 171 , the limiting bead 172 enters the limiting groove 103 .

Referring to Figures 1 and 3, in one embodiment, the projection lens further includes a reflector 16, which is installed on the third barrel 13; the direction of the mirror surface of the reflector 16 is relative to that of the third lens barrel 13. The first optical axis and the second optical axis both form an acute angle;

The light passes through the second lens group 15 , the reflecting mirror 16 and the first lens group 14 and emerges from the first lens barrel 11 .

In this specific example, the reflection of light by the reflector 16 achieves a predetermined angle formed between the first optical axis and the second optical axis. For example, the predetermined included angle is 90°, that is, the first optical axis and the second optical axis are perpendicular to each other, which is beneficial to reducing the overall size of the projection lens; in this way, the mirror direction of the reflector 16 is consistent with the first optical axis and the second optical axis. The optical axes are all at an included angle of 45°.

Referring to FIG. 3 , in one embodiment, the third lens barrel 13 includes a first sub-lens barrel 131 and a second sub-lens barrel 132 . The first sub-lens barrel 131 and the second sub-lens barrel 132 132 fixed connection;

One end of the first sub-barrel 131 is connected to the first lens barrel 11 , and the second sub-barrel 132 is rotatably connected to the second lens barrel 12 .

In this specific example, the first sub-barrel 131 is used to connect with the first lens barrel 11; for example, the first lens barrel 11 has a first flange 110, and the first sub-barrel 131 has a second flange. 130. The first flange 110 and the second flange 130 are connected through fasteners such as bolts. The second sub-lens barrel 132 is used to be sleeved with the second lens barrel 12 . Specifically, the second sub-lens barrel 132 is sleeved on the outside of the second lens barrel 12 .

In addition, the first sub-barrel 131 is provided with a mounting plate 1311 for mounting the reflector 16. The back of the reflector 16 can be bonded to the mounting plate 1311, or the back of the reflector 16 can be fixed to the mounting plate through fasteners such as bolts. Plate 1311.

For example, the axial directions of the first flange 110 and the second flange 130 are the first direction, the axial directions of the second sub-lens barrel 132 and the second lens barrel 12 are the second direction, and the first direction and the second direction They are perpendicular to each other, and the mounting plate 1311 is inclined at an angle of 45° relative to both the first direction and the second direction.

According to another embodiment of the present application, with reference to Figures 8a to 8c, a projection device is provided. The projection device includes the projection lens 1 as described above; and also includes a device body 2, and the projection lens 1 is installed on the device. Subject 2.

Using the above-mentioned projection lens 1, the projection direction of the projection image can be changed without moving the device body 2, thereby improving the convenience of use of the projection device.

Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present application. Those skilled in the art will understand that the above embodiments can be modified without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.

Claims (11)

1. A projection lens, the projection lens comprising:

a first lens barrel (11), wherein a first lens group (14) is arranged in the first lens barrel (11), and the first lens group (14) has a first optical axis;

a second lens barrel (12), wherein a second lens group (15) is arranged in the second lens barrel (12), the second lens group (15) is provided with a second optical axis, and a preset included angle is formed between the first optical axis and the second optical axis; light passes through the second lens group (15) and the first lens group (14) and exits from the first lens barrel (11);

the third lens cone (13), the third lens cone (13) with first lens cone (11) is connected, just third lens cone (13) with second lens cone (12) rotate and cup joint, third lens cone (13) can drive first lens cone (11) relative second lens cone (12) rotate.

2. Projection lens according to claim 1, characterized in that one of the second barrel (12) and the third barrel (13) is provided with a slide shaft (101) and the other is provided with a slide (100), the slide shaft (101) and the slide (100) sliding relatively in case of a relative rotation of the second barrel (12) and the third barrel (13).

3. The projection lens according to claim 2, wherein the slide shaft (101) is disposed on an outer side wall of the second barrel (12), and the slide way (100) is opened on a side wall of the third barrel (13); the third lens barrel (13) is sleeved outside the second lens barrel (12), and the sliding shaft (101) penetrates through the sliding way (100).

4. A projection lens according to claim 3, wherein at least two of said slide ways (100) are provided, at least two of said slide ways (100) being disposed at intervals along the axial direction of said second barrel (12); the number of the sliding shafts (101) is at least two, and the sliding shafts (101) are arranged in one-to-one correspondence with the sliding ways (100).

5. Projection lens according to claim 4, characterized in that at least two of said slide shafts (101) are evenly distributed around the central axis of said second barrel (12).

6. A projection lens according to claim 3, wherein the second lens barrel (12) is provided with a receiving groove (102), an elastic limiting member (17) is installed in the receiving groove (102), and the elastic limiting member (17) can elastically stretch and retract along the axial direction of the second lens barrel (12);

the bottom that third lens cone (13) with second lens cone (12) is connected is offered spacing groove (103), elasticity locating part (17) can partly hold in spacing inslot (103) in order to make third lens cone (13) with second lens cone (12) joint each other.

7. Projection lens according to claim 6, characterized in that the elastic limit piece (17) comprises a spring (171) and a limit bead (172), one end of the spring (171) being connected to the bottom of the containing groove (102) and the other end being connected to the limit bead (172); the spring (171) can elastically stretch along the axial direction of the second lens barrel (12), and the limiting beads (172) are partially exposed out of the accommodating groove (102) when the spring (171) is in a natural state.

8. Projection lens according to claim 6, characterized in that the number of limiting grooves (103) is at least two.

9. Projection lens according to any one of claims 1-8, characterized in that it further comprises a mirror (16), said mirror (16) being mounted to said third barrel (13); the mirror surface direction of the reflecting mirror (16) forms an acute angle with respect to the first optical axis and the second optical axis;

the light rays pass through the second lens group (15), the reflecting mirror (16) and the first lens group (14) and are emitted from the first lens cone (11).

10. The projection lens according to any one of claims 1-8, characterized in that the third barrel (13) comprises a first sub-barrel (131) and a second sub-barrel (132), the first sub-barrel (131) being fixedly connected with the second sub-barrel (132);

one end of the first sub-lens cone (131) is connected with the first lens cone (11), and the second sub-lens cone (132) is rotatably sleeved with the second lens cone (12).

11. Projection device, characterized in that it comprises a projection lens (1) according to any one of claims 1-10.