Projection equipment and projection system

Abstract

The utility model provides a projection device and a projection system, and relates to the technical field of projection, the projection system is provided with the projection device, and the projection device comprises a projection host which comprises a housing; the supporting piece is located at the bottom of the projection host and is in threaded connection with the shell; the elastic piece is in a compressed state, the first end of the elastic piece abuts against the shell in the compression direction of the elastic piece, and the second end of the elastic piece abuts against the supporting piece; and the direction of the elastic force applied by the elastic piece to the supporting piece deviates from the insertion direction of the supporting piece on the shell. According to the projection equipment and the projection system provided by the invention, the supporting piece connected to the shell is not easy to loosen or fall off, and the normal use of the projection equipment is ensured.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a projection device and a projection system. Background Art

[0002] Projection equipment is increasingly used in people's work and life, and the projection host of the projection equipment can project a relatively large-sized projection picture on the projection screen.

[0003] In the prior art, a support member, such as a caster, is disposed at the bottom of the shell of the projection host. The support member can play a role in supporting the projection host and can also be used to adjust the overall height of the projection device.

[0004] However, when the support member is connected to the housing of the projection host, the support member is prone to loosening or falling off during transportation and use, thereby affecting the normal use of the projection device. Utility Model Content

[0005] In view of the above problems, the present application provides a projection device and a projection system, so that the support member connected to the housing is not easy to loosen or fall off, thereby ensuring the normal use of the projection device.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A first aspect of the present application provides a projection device, comprising:

[0008] A projection host, the projection host comprising a housing;

[0009] A support member, which is located at the bottom of the projection host and is threadedly connected to the shell;

[0010] The elastic member is in a compressed state. Along the compression direction of the elastic member, the first end of the elastic member abuts against the shell, and the second end of the elastic member abuts against the support member. The direction of the elastic force applied by the elastic member to the support member is away from the insertion direction of the support member on the shell.

[0011] The beneficial effect of the present application is that the presence of the elastic member can increase the friction between the support member and the shell at the threaded connection, and play a role of pre-tightening and anti-loosening, so that the support member connected to the shell is not easy to loosen or fall off, ensuring the normal use of the projection equipment.

[0012] In a possible implementation, the shell includes a shell body and a first connecting member that are detachably connected, and the support member includes a second connecting member; the first connecting member and the second connecting member are threadedly connected.

[0013] In this way, after the first connecting member and the second connecting member are threadedly connected, it is convenient to connect the supporting member to the shell; in addition, after the shell body and the first connecting member are detachably connected, the maintenance cost of the shell can be reduced.

[0014] In a possible implementation, the support member further includes a support body, which is connected to an end of the second connecting member away from the first connecting member; at least a portion of the support body protrudes from the outer surface of the shell.

[0015] In this way, the support body protruding from the outer surface of the shell can be used to abut against the installation surface, which facilitates the installation of the projection device on the installation surface.

[0016] In a possible implementation, the support member further includes an elastic pad, and a side of the support member facing away from the shell has a support surface, and the elastic pad is arranged on the support surface.

[0017] In this way, the elastic pad can play a buffering role and prevent the support member from being damaged under a large load.

[0018] In a possible implementation, one of the first connecting member and the second connecting member has a threaded hole, and the other has a screw rod matched with the threaded hole, and the screw rod is connected to the threaded hole.

[0019] In this way, through the mutual cooperation of the screw rod and the threaded hole, a threaded connection is formed between the first connecting member and the second connecting member.

[0020] In a possible implementation manner, the extension directions of the first connecting member and the second connecting member are consistent and parallel to the compression direction of the elastic member.

[0021] In this way, the direction of the elastic force applied by the elastic member to the support member is opposite to the threaded insertion direction of the support member on the housing, further increasing the friction force between the support member and the housing at the threaded connection.

[0022] In a possible implementation manner, a mounting groove is provided on the shell body, and at least a portion of the first connecting member is installed in the mounting groove.

[0023] In this way, the existence of the mounting groove makes it easier for the first connecting member to be embedded in the shell body, so that the two can be connected together to form the shell body.

[0024] In a possible implementation, a receiving groove is provided inside the shell, and at least part of the supporting member and at least part of the elastic member are located in the receiving groove; the first end of the elastic member extends toward the bottom surface of the receiving groove.

[0025] In this way, the receiving groove can be used to accommodate and hide the support member and the elastic member, which can protect the support member and the elastic member while also improving the overall aesthetics of the exterior of the shell.

[0026] In a possible implementation, the shell is further provided with a positioning groove, the notch of which is located on the bottom surface of the accommodating groove; part of the elastic member is located in the positioning groove, and the first end of the elastic member abuts against the bottom surface of the positioning groove.

[0027] In this way, the positioning groove on the housing can limit the position of the elastic member, thereby preventing the elastic member from being displaced in position during elastic compression.

[0028] In a possible implementation, a first guide member is provided on the support member, an extension direction of the first guide member is consistent with a compression direction of the elastic member, and the elastic member is sleeved on an outer surface of the first guide member.

[0029] In this way, the existence of the first guide member can limit the inner circumference of the elastic member, ensuring that the elastic member can only be elastically deformed along the extension direction of the first guide member, thereby improving the stability of the elastic member during operation.

[0030] In a possible implementation, a second guide is provided on the housing, and the first guide is sleeved on the outer surface of the second guide; an extension direction of the first guide is parallel to an insertion direction of the support member on the housing;

[0031] The first guide and the second guide form a sliding pair and a rotating pair. The direction of the sliding pair is the extension direction of the first guide, and the rotation axis of the rotating pair is parallel to the extension direction of the first guide.

[0032] In this way, the first guide member and the second guide member cooperate with each other to guide the connection between the support member and the housing.

[0033] A second aspect of the present application provides a projection device, comprising:

[0034] A projection host, which is used to provide a housing;

[0035] A support member, which is used to be arranged at the bottom of the projection host and is used to be threadedly connected with the shell;

[0036] The elastic member is configured to be in a compressed state. Along the compression direction of the elastic member, the first end of the elastic member is used to abut the shell, and the second end is used to abut the support member. The direction of the elastic force applied by the elastic member to the support member is configured to deviate from the insertion direction of the support member on the shell.

[0037] A third aspect of the present application provides a projection system, comprising a projection screen and a projection device in any of the above implementations, wherein the projection device is used to project a projection picture onto the projection screen.

[0038] In the projection device provided by the present application, since the elastic force exerted by the elastic member on the support member deviates from the insertion direction of the support member on the shell, the presence of the elastic member can increase the friction between the support member and the shell at the threaded connection and play a pre-tightening role to avoid loosening of the connection between the two, thereby making the support member connected to the shell not easy to loosen or fall off, thereby ensuring the normal use of the projection device.

[0039] The structure of the present application and its other inventive objectives and beneficial effects will be more clearly understood through the description of the specific implementation methods in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A three-dimensional diagram of a projection device provided in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a first installation between a housing and a support member provided in an embodiment of the present application;

[0043] Figure 3 for Figure 2 Structural view of the middle shell;

[0044] Figure 4 for Figure 2 Structural view of the middle support;

[0045] Figure 5 For Figure 4 a top view of the corresponding support member;

[0046] Figure 6 A schematic diagram of a second installation between a housing and a support member provided in an embodiment of the present application;

[0047] Figure 7 for Figure 6 Structural view of the middle shell;

[0048] Figure 8 for Figure 6 Structural view of the middle support;

[0049] Fig. 9 A schematic diagram of a third installation between the housing and the support member provided in an embodiment of the present application;

[0050] Fig.10A schematic diagram of the projection device provided in an embodiment of the present application when projecting onto a projection screen.

[0051] Description of reference numerals:

[0052] 100-projection host; 110-housing;

[0053] 111-shell body; 111A-installation slot;

[0054] 111B-blocking surface; 112-first connecting member;

[0055] 113-accommodating groove; 114-positioning groove;

[0056] 115 - second guide member; 120 - projection lens;

[0057] 200-support member; 210-second connecting member;

[0058] 220-support body; 221-elastic pad;

[0059] 222-first guide member; 223-support surface;

[0060] 300-elastic part; 400-projection screen;

[0061] 500-Laser beam. DETAILED DESCRIPTION

[0062] In the projection equipment of the prior art, a support member, such as a caster, is provided at the bottom of the housing of the projection host, and the support member can abut against the mounting surface and play a role in supporting the projection host; at the same time, the position of the support member on the housing is adjustable, and by adjusting the support member, the overall height of the projection device can be adjusted. However, when the support member is connected to the housing of the projection host, the support member is prone to loosening or falling off during transportation and use, resulting in the projection device placed on the mounting surface not being able to remain stable, thereby affecting the normal use of the projection device.

[0063] Based on the above problems, the embodiment of the present application provides a projection device and a projection system. The projection system has a projection device, and the projection device includes a projection host, a support member and an elastic member. The support member is located at the bottom of the projection host and is threadedly connected to the shell of the projection host. In addition, the elastic member is in a compressed state. Along the compression direction of the elastic member, the first end of the elastic member abuts the shell, and the second end of the elastic member abuts the support member. The direction of the elastic force applied by the elastic member to the support member deviates from the insertion direction of the support member on the shell. Therefore, the elastic force applied by the elastic member to the support member can pre-tighten the threaded connection between the support member and the shell, preventing the connection between the two from loosening, so that the support member connected to the shell is not easy to loosen or fall off, ensuring the normal use of the projection device.

[0064] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0066] The following combination Figures 1 to 10 , the structure of the projection device provided in the embodiment of the present application is described in detail.

[0067] The projection device provided in the embodiment of the present application includes:

[0068] like Figures 1 to 6 As shown, the present application provides a projection device, comprising:

[0069] The projection host 100 includes a housing 110. It should be noted that the housing 110 has a cavity inside, and various optical components of the projection host 100 are located in the cavity, and the laser light 500 can be transmitted between these optical components. In addition, Figure 1 and Fig.10 As shown, the projection lens 120 of the projection host 100 is exposed on the surface of the housing 110 , and the laser light 500 can eventually pass through the projection lens 120 and be projected onto the projection screen 400 .

[0070] The support member 200 is located at the bottom of the projection host 100 and is threadedly connected to the housing 110. After the support member 200 is connected to the bottom of the projection host 100, the support member 200 can abut against the installation surface and play a role in supporting the projection host 100. Specifically, the support member 200 can be a caster. Figure 1 As shown, there may be a plurality of support members 200 , and the plurality of support members 200 are arranged at intervals and cooperate with each other to support the projection host 100 at the same time.

[0071] The elastic member 300 is in a compressed state. Along the compression direction of the elastic member 300, the first end of the elastic member 300 abuts against the housing 110, and the second end of the elastic member 300 abuts against the support member 200. The direction of the elastic force applied by the elastic member 300 to the support member 200 is away from the insertion direction of the support member 200 on the housing 110. It should be noted that the insertion direction of the support member 200 on the housing 110 refers to the threaded insertion direction of the support member 200 on the housing 110. In addition, when the elastic member 300 applies an elastic force to the support member 200, it also applies an elastic force to the housing 110, and the directions of the two elastic forces are opposite.

[0072] Thus, in the projection device provided by the present application, since the elastic force exerted by the elastic member 300 on the support member 200 deviates from the insertion direction of the support member 200 on the shell 110, the presence of the elastic member 300 can increase the friction between the support member 200 and the shell 110 at the threaded connection, and play a pre-tightening role to avoid loosening of the connection between the two, so that the support member 200 connected to the shell 110 is not easy to loosen or fall off, thereby ensuring the normal use of the projection device.

[0073] Specifically, the elastic member 300 may be a columnar spring, one end of which abuts against the shell 110 and the other end abuts against the support member 200 , so that the spring can apply elastic force to the support member 200 ; or, the elastic member 300 may also be an elastic object such as an elastic tube.

[0074] In addition, when the projection device is placed on the installation surface, the ends of the multiple support members 200 for contacting the installation surface are arranged flush with each other, thereby ensuring that the multiple support members 200 can support the projection host 100 at the same time.

[0075] In the embodiments of the present application, Figure 2 and Figure 6 As shown, the housing 110 includes a housing body 111 and a first connecting member 112 that are detachably connected, and the support member 200 includes a second connecting member 210; the first connecting member 112 and the second connecting member 210 are threadedly connected. After the first connecting member 112 and the second connecting member 210 are threadedly connected, it is convenient for the support member 200 to be connected to the housing 110; in addition, after the housing body 111 and the first connecting member 112 are detachably connected, when the first connecting member 112 is damaged, only the first connecting member 112 can be replaced, thereby reducing the maintenance cost.

[0076] In addition, the first connecting member 112 is embedded in the shell body 111. When designing the shell body 110, the shell body 111 can be made of plastic parts, which have the advantages of low cost and light weight; and the first connecting member 112 can be made of metal parts, which have the advantages of high strength and wear resistance, thereby improving the reliability of the threaded connection.

[0077] Further, such as Figure 2 and Figure 6 As shown, the support member 200 also includes a support body 220, which is connected to an end of the second connecting member 210 away from the first connecting member 112, and the support body 220 and the second connecting member 210 form the support member 200; in addition, at least part of the support body 220 protrudes from the outer surface of the housing 110, and the support body 220 protruding from the outer surface of the housing 110 can be used to abut against the installation surface, so as to facilitate the installation of the projection device on the installation surface. In addition, the second connecting member 210 can also be embedded in the support body 220, and the second connecting member 210 and the support body 220 can be detachably connected.

[0078] For example, Figure 4 and Figure 8 As shown, the support member 200 also includes an elastic pad 221. The side of the support member 200 facing away from the housing 110 has a support surface 223, and the elastic pad 221 is arranged on the support surface 223. When the support member 200 supports the projection host 100, the elastic pad 221 can play a buffering role to prevent the support member 200 from being damaged under a large load; in addition, when the projection device is installed on the installation surface, the elastic pad 221 can contact the installation surface, thereby increasing the friction between the support member 200 and the installation surface, so that the projection device is not easy to slide on the installation surface. In addition, the elastic pad 221 is a part of the support body 220, and the elastic pad 221 can protrude from the outer surface of the housing 110 as a whole, or the elastic pad 221 can also protrude from the outer surface of the housing 110 partially.

[0079] Specifically, one of the first connecting member 112 and the second connecting member 210 has a threaded hole, and the other has a screw rod adapted to the threaded hole, and the screw rod is connected to the threaded hole. Through the mutual cooperation of the screw rod and the threaded hole, it is convenient to form a threaded connection between the first connecting member 112 and the second connecting member 210. The extension direction of the screw rod and the threaded hole can be parallel to the compression direction of the elastic member 300.

[0080] In a specific embodiment, Figures 2 to 4 As shown, the first connecting member 112 has a threaded hole, and the second connecting member 210 is a rod and has a screw matched with the threaded hole, and the screw is connected in the threaded hole.

[0081] In another specific embodiment, Figures 6 to 8 As shown, the second connecting member 210 has a threaded hole, and the first connecting member 112 is a rod and has a screw matched with the threaded hole, and the screw is connected in the threaded hole.

[0082] Specifically, Figure 2 and Figure 6As shown, the extension direction of the first connecting member 112 and the second connecting member 210 is consistent and parallel to the compression direction of the elastic member 300. In this way, the direction of the elastic force applied by the elastic member 300 to the support member 200 is opposite to the threaded insertion direction of the support member 200 on the housing 110, thereby further increasing the friction force between the support member 200 and the housing 110 at the threaded connection.

[0083] Specifically, Figure 3 and Figure 7 As shown, the shell body 111 is provided with a mounting groove 111A, and at least part of the first connecting member 112 is installed in the mounting groove 111A; the existence of the mounting groove 111A facilitates the first connecting member 112 to be embedded in the shell body 111, and facilitates the two to be connected together to form the housing 110. In addition, the first connecting member 112 can be interference-fitted with the slot hole of the mounting groove 111A, so that the first connecting member 112 is conveniently fixed to the shell body 111.

[0084] In the embodiments of the present application, Figure 2 and Fig. 9 As shown, a receiving groove 113 is provided inside the housing 110, and at least part of the support member 200 and at least part of the elastic member 300 are located in the receiving groove 113; the first end of the elastic member 300 extends toward the bottom surface of the receiving groove 113. The receiving groove 113 can be used to accommodate and hide the support member 200 and the elastic member 300, and can not only protect the support member 200 and the elastic member 300, but also improve the overall aesthetics of the exterior of the housing 110. In addition, the side surface of the receiving groove 113 can be a stepped surface, and the stepped surface forms a blocking surface 111B, which can limit the position of the support member 200 and ensure that at least part of the support body 220 can protrude from the outer surface of the housing 110.

[0085] Further, such as Figure 2 and Fig. 9 As shown, the housing 110 is also provided with a positioning groove 114, the notch of which is located on the bottom surface of the accommodating groove 113; part of the elastic member 300 is located in the positioning groove 114, and the first end of the elastic member 300 abuts against the bottom surface of the positioning groove 114. In this way, the positioning groove 114 on the housing 110 can limit the position of the elastic member 300 and prevent the elastic member 300 from being offset in position during the compression process. Specifically, the positioning groove 114 is an annular groove; in addition, the support member 200 can also be provided with a positioning groove 114, the positioning groove 114 on the support member 200 is arranged opposite to the positioning groove 114 on the housing 110, and the second end of the elastic member 300 can abut against the bottom surface of the positioning groove 114 on the support member 200; thus, the two oppositely arranged positioning grooves 114 cooperate with each other, further ensuring that the elastic member 300 will not be offset in position during the elastic compression process.

[0086] In the embodiments of the present application, Figure 2 and Figure 4 As shown, the support member 200 is provided with a first guide member 222, the extension direction of the first guide member 222 is consistent with the compression direction of the elastic member 300, and the elastic member 300 is sleeved on the outer surface of the first guide member 222. Therefore, the existence of the first guide member 222 can play a role in limiting the inner circumference of the elastic member 300, ensuring that the elastic member 300 can only be elastically deformed along the extension direction of the first guide member 222 without being offset, thereby improving the stability of the elastic member 300 during operation. Specifically, the first guide member 222 is a part of the support body 220.

[0087] Further, such as Figure 2 and Figure 3 As shown, the housing 110 is provided with a second guide 115, the first guide 222 is sleeved on the outer surface of the second guide 115, and the extension direction of the first guide 222 is parallel to the insertion direction of the support 200 on the housing 110; the first guide 222 and the second guide 115 form a sliding pair and a rotating pair, the direction of the sliding pair is the extension direction of the first guide 222, and the rotation axis of the rotating pair is parallel to the extension direction of the first guide 222. Thus, the first guide 222 and the second guide 115 cooperate with each other to guide the connection between the support 200 and the housing 110; when the support 200 is screwed and inserted on the housing 110, the first guide 222 can slide relative to the second guide 115, and at the same time, the first guide 222 can also rotate relative to the second guide 115.

[0088] Specifically, Figure 5 As shown, the first guide member 222 and the second guide member 115 are cylinders, and the first guide member 222 and the second guide member 115 can slide and rotate relative to each other; when the elastic member 300 is a spring, the spring is sleeved on the outer cylinder surface of the first guide member 222.

[0089] In addition, the present application also provides a projection device, including a projection host 100, a support member 200 and an elastic member 300, wherein the projection host 100 is used to provide a housing 110; the support member 200 is used to be arranged at the bottom of the projection host 100 and is used to be threadedly connected with the housing 110; the elastic member 300 is configured to be in a compressed state, and along the compression direction of the elastic member 300, the first end of the elastic member 300 is used to abut against the housing 110, and the second end is used to abut against the support member 200; the direction of the elastic force applied by the elastic member 300 to the support member 200 is configured to be away from the insertion direction of the support member 200 on the housing 110. Therefore, the elastic member 300 in a compressed state can increase the friction force between the support member 200 and the housing 110 at the threaded connection, and play a role in pre-tightening and anti-loosening, so that the support member 200 connected to the housing 110 is not easy to loosen or fall off, thereby ensuring the normal use of the projection device.

[0090] On the basis of the above embodiments, the present application further provides a projection system, including a projection screen 400 and a projection device in any of the above embodiments, wherein the projection device is used to project a projection picture onto the projection screen 400 .

[0091] Specifically, Figure 1 As shown, the projection device includes a projection host 100 and a support member 200. After the support member 200 is connected to the bottom of the projection host 100, the support member 200 can play a role in supporting the projection host 100. At the same time, a projection lens 120 is also provided on the projection host 100, and the projection lens 120 faces the projection plane; Fig.10 As shown in the figure, a scene diagram when the projection device projects on the projection screen 400 is shown. The projection screen 400 is located obliquely above the projection host 100. The projection screen 400 can be set on a flat installation carrier such as a wall to ensure the flatness of the projection screen 400; the laser light 500 reflected by the digital micromirror device can be directed to the projection lens 120, and the laser light 500 directed to the projection lens 120 can pass through the projection lens 120 and form an image on the projection screen 400.

[0092] In the description of this application, it should be noted that the descriptions of the positions such as "top" and "bottom" are relative to Figure 1 With respect to the stereoscopic diagram of the projection device, the positive direction of the Z axis is the “top” orientation, and the negative direction of the Z axis is the “top” orientation, which should not be understood as a limitation to the present application.

[0093] In the description of the present application, it should be understood that, in addition, the terms "including" and "having" and any variations thereof are intended to cover but not exclude inclusion. The orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0095] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A projection device, characterized in that: include: A projection host, the projection host comprising a housing; A support member, the support member is located at the bottom of the projection host and is threadedly connected to the shell; An elastic member, wherein the elastic member is in a compressed state, and along the compression direction of the elastic member, the first end of the elastic member abuts against the shell, and the second end of the elastic member abuts against the support member; the direction of the elastic force applied by the elastic member to the support member is away from the insertion direction of the support member on the shell.

2. The projection device according to claim 1, characterized in that: The shell includes a shell body and a first connecting member that are detachably connected, and the support member includes a second connecting member; the first connecting member and the second connecting member are threadedly connected.

3. The projection device according to claim 2, characterized in that: The support member further comprises a support body, the support body being connected to an end of the second connecting member away from the first connecting member; at least a portion of the support body protrudes from the outer surface of the shell; And / or, the support member further includes an elastic pad, the support member has a support surface on a side facing away from the shell, and the elastic pad is arranged on the support surface.

4. The projection device according to claim 2, characterized in that: One of the first connecting member and the second connecting member has a threaded hole, and the other has a screw rod matched with the threaded hole, and the screw rod is connected to the threaded hole; And / or, the extension direction of the first connecting member and the second connecting member is consistent and parallel to the compression direction of the elastic member; And / or, a mounting groove is provided on the shell body, and at least a part of the first connecting member is installed in the mounting groove.

5. The projection device according to any one of claims 1 to 4, characterized in that: An accommodating groove is provided inside the shell, and at least part of the supporting member and at least part of the elastic member are located in the accommodating groove; the first end of the elastic member extends toward the bottom surface of the accommodating groove.

6. The projection device according to claim 5, characterized in that: The housing is further provided with a positioning groove, the notch of which is located on the bottom surface of the accommodating groove; part of the elastic member is located in the positioning groove, and the first end of the elastic member abuts against the bottom surface of the positioning groove.

7. The projection device according to any one of claims 1 to 4, characterized in that: The support member is provided with a first guide member, the extension direction of the first guide member is consistent with the compression direction of the elastic member, and the elastic member is sleeved on the outer surface of the first guide member.

8. The projection device according to claim 7, characterized in that: The housing is provided with a second guide member, and the first guide member is sleeved on the outer surface of the second guide member; the extension direction of the first guide member is parallel to the insertion direction of the support member on the housing; The first guide and the second guide form a sliding pair and a rotating pair, the direction of the sliding pair is the extension direction of the first guide, and the rotation axis of the rotating pair is parallel to the extension direction of the first guide.

9. A projection device, characterized in that: include: A projection host, the projection host is used to provide a housing; A support member, the support member is used to be arranged at the bottom of the projection host and is used to be threadedly connected to the shell; An elastic member, wherein the elastic member is configured to be in a compressed state, and along the compression direction of the elastic member, the first end of the elastic member is used to abut the shell, and the second end is used to abut the support member; the direction of the elastic force applied by the elastic member to the support member is configured to deviate from the insertion direction of the support member on the shell.

10. A projection system, characterized in that: It comprises a projection screen and the projection device according to any one of claims 1 to 9, wherein the projection device is used to project a projection picture onto the projection screen.

Images