Projection mechanism and projector

Abstract

The projection mechanism comprises a fixing frame installed in the projector, the fixing frame is provided with a light through hole and is fixedly provided with a fixing ring, the light through hole is coaxial with the fixing ring, one side face of the fixing frame is fixedly provided with a light source assembly for providing a light source for projection and projection, and the light source assembly is provided with a light source. An imaging mounting frame capable of axially sliding is arranged on the fixing ring, an imaging lens is fixedly mounted in the imaging mounting frame, and a knob assembly in threaded transmission connection with the outer surface of the imaging mounting frame is mounted on a shell of the projector. The rotary knob assembly drives the imaging mounting frame to axially move on the fixing ring in a threaded connection mode, so that the position of the imaging lens is changed, the influence on projection is adjusted, a projected picture is clearer, and the projection effect is better. And the position of the imaging lens is adjusted through thread transmission, so that the adjustment process is more stable, and the generation of adjustment shaking is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of projectors, in particular to a projection mechanism and a projector. Background Art

[0002] Traditional projection equipment usually uses a lens with a fixed focal length, which limits the application of projection equipment in different scenarios to a certain extent. In order to meet the requirements of different projection distances and screen sizes, most existing projection equipment is equipped with a focus adjustment mechanism. However, these focus adjustment mechanisms still have certain problems in design and implementation.

[0003] Some focus adjustment mechanisms may shake or become unstable during the adjustment process, which affects the clarity and stability of the projected image. To this end, we provide a projection mechanism and a projector to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a projection mechanism and a projector.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A projection mechanism comprises a fixed frame installed in a projector, wherein the fixed frame is provided with a light-through hole and a fixed ring, and the light-through hole is coaxial with the fixed ring, a light source assembly for providing light source for projection is fixedly installed on one side of the fixed frame, an imaging mounting frame which can slide axially on the fixed ring, an imaging lens is fixedly installed inside the imaging mounting frame, and a knob assembly which is threadedly connected to the outer surface of the imaging mounting frame is installed on the housing of the projector.

[0007] Preferably, the fixed frame includes a left bracket and a right bracket fixedly installed inside the projector, the light-through hole is opened through the side of the left bracket, the fixed ring is fixedly arranged on the side of the right bracket facing the imaging mounting frame, and the center hole of the fixed ring is connected with the right bracket and is coaxially arranged with the light-through hole.

[0008] Preferably, the light source assembly includes a lamp board for providing a light source, and a focusing mounting frame coaxial with the light through hole is detachably fixedly mounted on the side of the left bracket facing away from the right bracket, and a condenser is fixedly mounted inside the focusing mounting frame.

[0009] Preferably, the focusing mounting frame comprises a bearing frame that is detachably fixedly mounted on the side surface of the left bracket, a first mounting surface and a second mounting surface are respectively arranged inside the bearing frame, and an abutting ring frame is arranged on the end surface of the bearing frame away from the left bracket;

[0010] The condenser includes a first mirror body located between the first mounting surface and the abutting ring frame, and also includes a second mirror body located between the second mounting surface and the left bracket.

[0011] Preferably, the fixing ring comprises a ring body fixedly arranged on the side surface of the right bracket, the end surface of the ring body is provided with a ring body, and the imaging mounting frame is located in the ring body and is slidably connected to the sliding groove.

[0012] Preferably, the imaging mounting bracket includes a guide ring placed inside the ring body, the outer circular surface of the guide ring is provided with a first guide rib adapted to the sliding groove, the guide ring has a detachable fixed mounting end inside the guide ring with an externally threaded mounting tube, the inner circular surface of the guide ring is provided with a second guide rib, and the outer surface of the mounting tube is provided with a limiting groove adapted to the second guide rib.

[0013] Preferably, a snap-on structure for disassembling the fixed connection is provided between the guide ring and the mounting tube, the snap-on structure comprises a clamping block provided on the outer surface of the mounting tube, and a clamping groove adapted to the clamping block is provided on the guide ring.

[0014] Preferably, the knob assembly includes a transmission ring and a rotating knob located on both sides of the projector, the end of the transmission ring passes through a hole in the projector housing and is fixedly connected to the rotating knob, and the transmission ring is provided with an internal thread that is threadedly connected to the imaging mounting frame.

[0015] A projector comprises an outer shell, in which any one of the projection mechanisms described above is installed.

[0016] The utility model has the following advantages:

[0017] 1. The utility model drives the imaging mounting frame to move axially on the fixing ring by means of a threaded connection through a knob assembly, thereby changing the position of the imaging lens and adjusting the projection effect, thereby making the projected image clearer. In addition, since the position of the imaging lens is adjusted through threaded transmission, the adjustment process is smoother and the generation of adjustment shaking is reduced.

[0018] 2. The utility model uses a condenser to direct the light from the lamp panel through the light hole to the film position, and projects the image of the film onto the imaging lens to achieve a projection effect.

[0019] 3. The utility model transmits power to the mounting tube through the thread by rotating the knob assembly, and converts the rotational power transmitted to the mounting tube into an axial movement force by clamping and fixing the guide ring and the mounting tube, and limiting the first guide rib and the sliding groove in the circumferential direction, thereby realizing the axial position adjustment of the imaging lens inside the mounting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the utility model in an exploded state with a projector shell as a whole.

[0021] Figure 2 It is a schematic diagram of the overall explosion state of the utility model.

[0022] Figure 3 It is a schematic diagram of the right bracket and the imaging mounting frame of the utility model in the exploded state.

[0023] Figure 4 This is a schematic diagram of the explosion state of the imaging mounting frame of the utility model.

[0024] Figure 5 It is a schematic diagram of the explosion state of the light source assembly and the left bracket of the utility model.

[0025] Figure 6 It is a cross-sectional schematic diagram of the light source assembly and the left bracket of the utility model.

[0026] Figure 7 It is a structural schematic diagram of the utility model in which the right bracket and the fixing ring are integrally formed.

[0027] In the figure, 1, fixing frame; 1a, left bracket; 1b, right bracket; 2, light source assembly; 21, lamp board; 22, focusing mounting frame; 221, supporting frame; 222, abutting ring frame; 223, first mounting surface; 224, second mounting surface; 23, focusing lens; 231, first mirror body; 232, second mirror body; 3, light through hole; 4, fixing ring; 41, ring body; 42, sliding groove; 5, imaging lens; 6, imaging mounting frame; 61, guide ring; 62, first guide rib; 63, second guide rib; 64, mounting tube; 65, limiting groove; 7, knob assembly; 71, transmission ring; 72, rotating knob; 8, buckle structure; 81, clamping block; 82, clamping groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1 — Figure 7 The embodiment shown.

[0031] A projection mechanism comprises a fixing frame 1 installed in a projector, wherein the fixing frame 1 is provided with a light hole 3 and a fixing ring 4 fixedly arranged thereon, and the light hole 3 is coaxial with the fixing ring 4, a light source assembly 2 for providing light source for projection projection is fixedly installed on one side of the fixing frame 1, an imaging mounting frame 6 which can slide axially on the fixing ring 4, an imaging lens 5 is fixedly installed inside the imaging mounting frame 6, and a knob assembly 7 which is threadedly connected to the outer surface of the imaging mounting frame 6 is installed on the housing of the projector.

[0032] See also Figure 1 As shown, when adjustment is required, the knob assembly 7 first transmits power to the imaging mount 6 through a threaded connection transmission, and the imaging mount 6 can move axially on the fixed ring 4 and is limited in the circumferential direction, that is, the imaging mount 6 cannot rotate on the fixed ring 4 but can move axially, and the cooperation between the imaging mount 6 and the fixed ring 4 converts the rotational power from the knob assembly 7 into a force for axial movement of the imaging mount 6. To this end, the axial position of the imaging mount 6 is adjusted by the knob assembly 7, and the position of the imaging lens 5 is adjusted, thereby realizing focal length adjustment and adjusting the imaging quality.

[0033] The imaging mounting bracket 6 and the knob assembly 7 are adjusted through thread transmission, which makes the adjustment more stable and prevents shaking during adjustment.

[0034] The fixed frame 1 includes a left bracket 1a and a right bracket 1b fixedly installed inside the projector, the light hole 3 is opened through the side of the left bracket 1a, the fixed ring 4 is fixedly set on the side of the right bracket 1b facing the imaging mounting frame 6, and the center hole of the fixed ring 4 is connected with the right bracket 1b and is coaxially arranged with the light hole 3.

[0035] See also Figures 1 to 3As shown, the center hole of the fixing ring 4 is penetrated by the right bracket 1b and is coaxial with the light-through hole 3, so that the projection light from the light source assembly 2 can pass through the light-through hole 3 and the center hole of the fixing ring 4 to illuminate the corresponding film. It can be understood that the center hole of the fixing ring 4 facilitates the passage of light from the light source assembly 2 and avoids blocking the projection light of the light source assembly 2.

[0036] The light source assembly 2 includes a lamp board 21 for providing a light source, and a focusing mounting frame 22 coaxial with the light hole 3 is detachably fixedly mounted on the side of the left bracket 1a away from the right bracket 1b, and a focusing mirror 23 is fixedly mounted inside the focusing mounting frame 22.

[0037] The focusing mounting frame 22 comprises a supporting frame 221 which is detachably fixedly mounted on the side of the left bracket 1a, wherein a first mounting surface 223 and a second mounting surface 224 are respectively arranged inside the supporting frame 221, and an abutting ring frame 222 is arranged on the end surface of the supporting frame 221 away from the left bracket 1a;

[0038] The condenser 23 includes a first mirror body 231 located between the first mounting surface 223 and the abutting ring frame 222 , and also includes a second mirror body 232 located between the second mounting surface 224 and the left bracket 1 a .

[0039] See also Figures 1 to 6 As shown, by gathering the light by the first mirror body 231 and the second mirror body 232, the intensity of the light from the lamp board 21 is increased to meet the projection needs. Specifically, during the installation process, the second mirror body 232 is coaxially installed before the end face of the light-through hole 3. Next, the supporting frame 221 is installed to the end face of the left bracket 1a so that the second mounting surface 224 abuts against the second mirror body 232, thereby completing the fixation of the second mirror body 232. Then, the first mirror body 231 is installed in the first mounting surface 223 inside the supporting frame 221, and the abutment ring frame 222 is clamped into the supporting frame 221 to achieve abutment and fixation of the first mirror body 231, thereby completing the installation of the focusing mounting frame 22 and the focusing mirror 23.

[0040] The fixing ring 4 includes a ring body 41 fixedly arranged on the side of the right bracket 1 b , and the end surface of the ring body 41 is provided with a ring body 41 . The imaging mounting frame 6 is located in the ring body 41 and is slidably connected to the sliding groove 42 .

[0041] The imaging mounting frame 6 includes a guide ring 61 placed inside the ring body 41, the outer circumferential surface of the guide ring 61 is provided with a first guide rib 62 adapted to the sliding groove 42, the guide ring 61 has a detachable fixed mounting end with an externally threaded mounting tube 64, the inner circumferential surface of the guide ring 61 is provided with a second guide rib 63, and the outer surface of the mounting tube 64 is provided with a limiting groove 65 adapted to the second guide rib 63.

[0042] See also Figure 3 and Figure 4 As shown, in order to convert the rotational force from the knob assembly 7 into an axial movement force, the mounting tube 64 is first fixedly installed by the snap-fit ​​structure 8 and the second guide rib 63 in combination with the limiting groove 65, and then the guide ring 61 is installed in the ring body 41 by the first guide rib 62 and the sliding groove 42. At this time, the guide ring 61 is limited in the rotational direction by the limiting cooperation between the sliding groove 42 and the first guide rib 62 and cannot rotate, but is not restricted in the axial direction. Furthermore, the mounting tube 64 is connected to the knob assembly 7 through a threaded transmission, and the position of the knob assembly 7 is fixed. When the knob assembly 7 rotates, the mounting tube 64 is moved axially under the guidance of the sliding groove 42 through threaded transmission, thereby realizing the position adjustment of the imaging lens 5.

[0043] A snap-fit ​​structure 8 for disassembling the fixed connection is provided between the guide ring 61 and the mounting tube 64 . The snap-fit ​​structure 8 includes a clamping block 81 provided on the outer surface of the mounting tube 64 , and a clamping groove 82 adapted to the clamping block 81 is provided on the guide ring 61 .

[0044] See also Figure 3 and Figure 4 As shown, when the knob assembly 7 drives the mounting tube 64 to move axially, in order to enable the guide ring 61 and the mounting tube 64 to move fixedly and synchronously, the guided movement is achieved through the sliding groove 42, and the two are detachably fixedly connected by the engagement of the clamping block 81 and the clamping groove 82.

[0045] Regarding the positions of the block 81 and the slot 82, specifically, in other solutions, the block 81 can be set on the guide ring 61, and the slot 82 can be set on the mounting tube 64, so that the two can also be detachably fixedly installed and connected.

[0046] The knob assembly 7 includes a transmission ring 71 and a rotating knob 72 located on both sides of the projector. The end of the transmission ring 71 passes through the hole of the projector shell and is fixedly connected to the rotating knob 72. The transmission ring 71 is provided with an internal thread that is threadedly connected to the imaging mounting frame 6.

[0047] See also Figure 1 and Figure 2As shown, the transmission ring 71 and the rotating knob 72 are respectively located on the inner and outer sides of the projector housing. Specifically, the transmission ring 71 passes through the hole on the projector housing and is fixedly connected with the rotating knob 72. The internal thread of the transmission ring 71 is threadedly connected with the external thread of the mounting tube 64. To this end, the rotating knob 72 drives the transmission ring 71 to rotate, thereby realizing the transmission of power to the mounting tube 64.

[0048] A projector comprises an outer shell in which any one of the projection mechanisms described above is installed; and also comprises a corresponding film assembly, wherein the film rotates through a light hole 3, thereby realizing projection of an image on the film.

[0049] The working process of the utility model is as follows: first, the condenser 23 condenses the light from the lamp board 21, and the concentrated light passes through the light hole 3 to project the image on the film at its position, and as the light from the condenser 23 is irradiated, the image passes through the imaging lens 5 and is projected to the corresponding position; when it is necessary to adjust the position of the imaging lens 5, first rotate the knob assembly 7 to transmit the rotational power to the imaging mounting frame 6. Since the imaging mounting frame 6 and the fixing ring 4 are limited in the circumferential direction, the rotational power is converted into axial movement power under the threaded power transmission mode of the imaging mounting frame 6 and the knob assembly 7, driving the imaging lens 5 in the imaging mounting frame 6 to move axially, thereby realizing the adjustment of the imaging lens 5.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A projection mechanism, comprising a fixing frame (1) installed in a projector, characterized in that: The fixing frame (1) is provided with a light-through hole (3) and a fixing ring (4) fixedly arranged thereon, and the light-through hole (3) is coaxial with the fixing ring (4); a light source assembly (2) for providing light source for projection is fixedly mounted on one side of the fixing frame (1); an imaging mounting frame (6) capable of axial sliding movement is mounted on the fixing ring (4); an imaging lens (5) is fixedly mounted inside the imaging mounting frame (6); and a knob assembly (7) threadedly connected to the outer surface of the imaging mounting frame (6) is mounted on the housing of the projector.

2. A projection mechanism according to claim 1, characterized in that: The fixing frame (1) comprises a left bracket (1a) and a right bracket (1b) fixedly mounted inside the projector; the light-through hole (3) is opened through the side of the left bracket (1a); the fixing ring (4) is fixedly arranged on the side of the right bracket (1b) facing the imaging mounting frame (6); the center hole of the fixing ring (4) is connected to the right bracket (1b) through the center hole and is coaxially arranged with the light-through hole (3).

3. A projection mechanism according to claim 2, characterized in that: The light source assembly (2) comprises a light board (21) for providing a light source, and a condenser mounting frame (22) coaxial with the light through hole (3) is detachably fixedly mounted on the side of the left bracket (1a) facing away from the right bracket (1b), and a condenser mirror (23) is fixedly mounted inside the condenser mounting frame (22).

4. A projection mechanism according to claim 3, characterized in that: The focusing mounting frame (22) comprises a bearing frame (221) which is detachably fixedly mounted on the side surface of the left bracket (1a); a first mounting surface (223) and a second mounting surface (224) are respectively arranged inside the bearing frame (221); and an abutting ring frame (222) is arranged on the end surface of the bearing frame (221) away from the left bracket (1a); The condenser mirror (23) comprises a first mirror body (231) located between the first mounting surface (223) and the abutting ring frame (222), and also comprises a second mirror body (232) located between the second mounting surface (224) and the left bracket (1a).

5. A projection mechanism according to claim 2, characterized in that: The fixed ring (4) comprises a ring body (41) fixedly arranged on the side surface of the right bracket (1b), the end surface of the ring body (41) is provided with a ring body (41), and the imaging mounting frame (6) is located in the ring body (41) and is slidably connected to the sliding groove (42).

6. A projection mechanism according to claim 5, characterized in that: The imaging mounting frame (6) comprises a guide ring (61) placed inside the ring body (41), the outer circumferential surface of the guide ring (61) is provided with a first guide rib (62) adapted to the sliding groove (42), a mounting tube (64) with an external thread at a detachable fixed mounting end inside the guide ring (61), the inner circumferential surface of the guide ring (61) is provided with a second guide rib (63), and the outer surface of the mounting tube (64) is provided with a limiting groove (65) adapted to the second guide rib (63).

7. A projection mechanism according to claim 6, characterized in that: A snap-fit ​​structure (8) for disassembling the fixed connection is provided between the guide ring (61) and the mounting tube (64); the snap-fit ​​structure (8) comprises a snap block (81) provided on the outer surface of the mounting tube (64); and a snap groove (82) adapted to the snap block (81) is provided on the guide ring (61).

8. The projection mechanism according to claim 1, characterized in that: The knob assembly (7) comprises a transmission ring (71) and a rotation knob (72) located on both sides of the projector. The end of the transmission ring (71) passes through a hole in the projector housing and is fixedly connected to the rotation knob (72). The transmission ring (71) is provided with an internal thread that is threadedly connected to the imaging mounting frame (6).

9. A projector, comprising an outer shell, characterized in that: A projection mechanism according to any one of claims 1 to 7 is installed in the outer shell.

Images