TWI715757B - Projection system and extension mechanism - Google Patents

Abstract

The present invention discloses a projection system that can be automatically deployed. By utilizing a scissor type extendable linkage, linkages, and a driving mechanism, with a small number, or even a single driving part, the projection system can be extended in various direction, or even be automatically deployed.

Description

Projection system and extension mechanism

The present invention relates to a projection system and a stretching mechanism, and more particularly to a projection system and a stretching mechanism including a stretching mechanism that can be expanded in multiple axial directions.

In all areas of life, it is common to construct a supporting surface in space to allow components to support. For example, a music stand, a support stand for a tablet computer, and the erection of a mobile projection screen of the projector 30 are examples. At present, one of the common practices in the industry, taking the music stand as an example, is to use a foldable connecting rod structure. After the user unfolds the connecting rod structure and assembles it into a solid geometric shape frame, one of them is used. The surface is used as object support. It is also seen that after connecting rods are used to form a stereo, a projection screen is provided at each contact point of the stereo to be used for image projection of the projector 30.

An embodiment of the present invention provides a projection system. A projection system includes a projection screen, a scissor telescopic frame, a first mechanism and a second mechanism. The scissor telescopic frame can extend and contract in a specific direction, and the first mechanism and the second mechanism are connected to the two ends of the scissor telescopic frame and can be driven by the scissor telescopic frame to extend in another direction perpendicular to the aforementioned specific direction. This constitutes a type of two-dimensional plane to carry the end points of the projection screen so that the projection screen can be expanded.

More specifically, the projection screen includes a first end and a second end; while the scissor telescopic frame includes a scissor telescopic frame first link, a scissor telescopic frame second link, and a scissor telescopic frame second link. Three connecting rods and one scissor telescopic frame fourth link, scissor telescopic frame first link first The first end is provided with a first end and a first contact, and the first end of the third link of the scissor telescopic frame is provided with a first end and the first contact; and the first mechanism includes the first link of the first mechanism, The second link of the first mechanism, and the third link of the first mechanism, the first end of the first link of the first mechanism is provided with a first contact and a second contact, and the first end of the third link of the first mechanism , Is provided with a first connection; the first connecting rod of the first mechanism is connected with the first connecting point of the first end of the first connecting rod of the scissor telescopic frame by the first connecting point, the second end of the first connecting rod of the first mechanism It is connected to one end of the second link of the first mechanism, the other end of the second link of the first mechanism is connected to one end of the second link of the scissor telescopic frame, and the first end of the first link of the first mechanism is the second connection point, It is connected to the first contact of the first end of the third link of the first mechanism, and the first end of the projection screen is connected to the first mechanism; in addition, the second mechanism includes the first link of the second mechanism and the second mechanism of the second mechanism. The connecting rod, and the third connecting rod of the second mechanism, the first end of the first connecting rod of the second mechanism is provided with a first contact and a second contact, and the first end of the third connecting rod of the second mechanism is provided with a first The first connecting rod of the second mechanism is connected with the first connecting point of the first end of the third connecting rod of the scissor telescopic frame by the first connecting point, and the second end of the first connecting rod of the second mechanism is connected with the first connecting rod of the second mechanism. One end of the two connecting rods is connected, the other end of the second connecting rod of the second mechanism is connected to one end of the fourth connecting rod of the scissor telescopic frame, the first end of the first connecting rod of the second mechanism is connected to the second connecting point of the second mechanism. The first end of the three-link is connected to the first contact point, and the second end of the projection screen is connected to the second mechanism.

That is, in an example of the present invention, it has the function of expanding the projection screen into a two-dimensional plane in multiple directions. In another example, after connecting the transmission mechanism and a power source such as a motor, it has to have an automatic deployment function. In addition, in order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

1: Projection system

10: Stretching mechanism

110: connecting rod group

110S: bearing surface

111: The first scissor telescopic frame

111A~111F: connecting rod

111A1, 111B11, 111C1, 111D1, 111E1, 111F1: Head contact

111A2: tail contact

112: The first institution

112A~112F: connecting rod

112A1, 112B1, 112C1, 112D1, 112E1, 112F1: Head contact

112A2, 112B2, 112C3, 112D2, 112F2: tail contact

112AZ, 112BZ, 112CZ: Chute

113: The second scissor telescopic frame

114: second organization

120: Transmission mechanism

121: drive mechanism

122: Motor

20: Carrier

30: Projector

31: Shell

311: Pedestal

312: Rotary joint

32: Projection lens

33: light outlet

P1: The first fixed end point

P2: second fixed end point

Φ: inner included angle

T1: first endpoint

T2: second terminal

T3: third terminal

T4: Fourth terminal

V1: first vector

V2: second vector

FIG. 1 is a schematic diagram of the first embodiment of the projection system of the present invention when the connecting rod group is fully expanded.

2 is a schematic diagram of some components of the projection system of the first embodiment of the present invention during the unfolding process of the support frame.

3 to 7 are schematic diagrams of some components of the projection system of the first embodiment of the present invention during the unfolding process of the support frame.

FIG. 8 is a schematic diagram of some components of the second embodiment of the projection system of the present invention during the unfolding process of the support frame.

The foregoing and other technical content, features, and effects of the present invention will be clearly presented in the detailed description of multiple embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as "up", "down", "front", "rear", "left", "right", etc., are just directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate rather than to limit the present invention. In addition, the terms "first" and "second" used in the following embodiments are used to identify the same or similar elements, and are not used to limit the elements. In addition, the following embodiments only provide a further description of the projection system, and those skilled in the art can apply the connection system to any required conditions according to actual needs.

The A component and the B component are pivotally connected along the A direction, and at least one of the nail component or the B component can rotate relative to the other along an axis, and the length of the axis is the A direction.

In brief, the present invention discloses a projection system 1. In one example, it includes a motor 122 or other electric driving device that converts electrical energy into kinetic energy to drive the automatic extension mechanism 10. The structure of the stretching mechanism 10 can be integrated with the projector 30 to support a projection screen 20. One of the designs of one of the embodiments of the present invention is that a transmission mechanism 121 is provided on a surface of the projector 30, which can rotate in a single axis along the first fixed end point P1, and then drive by The scissor telescopic frame 110 is composed of the first scissor telescopic frame 111. The aforementioned transmission mechanism 121 is an actuating rod or a rotating rod in this example. The scissor-type telescopic frame will extend when the driving mechanism 121 exerts downward pressure. In addition, by adding a first mechanism 112 composed of seven connecting rod groups 110 at the end of the scissor telescopic frame 110, a bearing surface 110S in the height direction can be further extended. That is, only by driving the rotation of the single transmission mechanism 121 by the motor, a two-dimensional support plane whose height and width meet actual requirements can be automatically extended. At the same time, the angle of the two-dimensional support plane will also change with the rotation of the transmission mechanism 121. In one example, the stretching mechanism 10 can be a support frame.

In this example, the projection system 1 includes an extension mechanism 10 and a carrying object 20. The stretching mechanism 10 provides a carrying surface 110S for carrying the carrying object 20 or connecting to the surface thereof. Please refer to FIG. 1, which is a schematic diagram of the first embodiment of the projection system 1 of the present invention when the extension mechanism 10 is fully deployed. It can be seen from the figure that the projection system 1 includes an extension mechanism 10, a carrying object 20 and a projector 30. In this example, the carrying object 20 is a projection screen. The stretching mechanism 10 further includes a connecting rod group 110 and a transmission mechanism 120.

When the extension mechanism of this example is applied, the extension mechanism 10 and the transmission mechanism 120 are respectively connected to the base 311. The base 311 in this example refers to a partial area inside and outside the housing of the projector 30. The motor 122 in the transmission mechanism 120 drives the transmission mechanism 121 to change the angle of the extension mechanism 10 relative to the surface of the base 311. While the angle of the connecting rod group 110 is changed, the transmission mechanism 121 will apply a force to the first and second scissor telescopic frames 111 and 113 in the connecting rod group 110 to deform them and make them transverse and longitudinal (or It is called the length and height direction) to expand, and then expand the projection screen 20 pre-connected to each contact point so that the image of the projector 30 can be output by this.

Each component in the system is described below. The projector 30 of the present invention generally refers to an electronic device that can provide image light. The projector 30 includes a light source, a light valve and a projection lens 32. The light source provides illumination light to the light valve, and the light valve converts the illumination light into image light and outputs it through the projection lens 32. The so-called light valve in the present invention is an exponential microlens array (DMD), a liquid crystal surface LCD panel (LCD) or liquid crystal on silicon panel (LCOS). In this example, the light valve is a digital micro lens array. Generally speaking, the projector 30 has a housing 31, and the housing 31 can accommodate at least part of the aforementioned light source, light valve, and projection lens 32 therein. As shown in FIG. 1, a light outlet 33 is provided on the housing 31 of the projector 30. The housing 31 is provided with the aforementioned projection lens 32 relative to the inside of the light exit 33, so that the image light output by the projection lens 32 is emitted through the light exit 33. The so-called light outlet 33 refers to a part of the housing 31 that is perforated or is relatively transparent and allows light to pass through. In this example, the light outlet 33 of the housing 31 is additionally provided with a protective glass. Prevent damage to the projection lens 32. In addition, the so-called projector 30 in the present invention refers to a front projection type projector 30 or a rear projection type projector 30 according to the relative position of the projector 30 and the imaging plane. In addition, the projector 30 of the present invention refers to the reflective projector 30 or the front projection projector 30 according to the traveling mode of the image light. Furthermore, generally speaking, the projection ratio of a general projector 30 is between 1.5 and 1.9, and when the projection ratio is less than 1, it is called a short-throw projector 30, and the projection ratio of the front projection type short-throw is about 0.5 to 1, and the reflection type has a throw ratio of less than 0.5. In this example, the projector 30 is a front projection short-focus reflective projector 30 with a projection ratio of less than 0.5. Furthermore, as shown in the figure, a base 311 is provided on one surface of the housing 31. The aforementioned base 311 refers to a surface on which external components can be arranged. In this example, a rotating joint 312 is provided on the edge of the base 311. The rotary joint 312 protrudes in opposite directions on both sides of the rotary joint 312, and each protrusion has a horizontal plane, which can be movably connected or pivotally connected with elements such as connecting rods.

In addition, the so-called carrying object 20 of the present invention is not specifically limited. From projection screens to three-dimensional three-dimensional objects, such as books, can be used as the carrying object 20 of the present invention. In this example, the carrying object 20 is a projection screen. According to its nature, projection screens can be generally divided into two types: rigid or flexible, and according to the nature of the light passing through, they can generally be divided into two types: reflective and transmissive. The reflective type is mostly used for orthographic projection, and the transmissive type is mostly used for rear projection. ; Front projection screens are divided into flat screens and arc screens; flat screens can be divided into glass bead screens, metal screens, embossed plastic screens, elastic screens, etc. in terms of material. More specifically, this example The carrier 20 referred to in the middle is a flexible reflective projection screen. The projection screen 2 has a first end T1, a second end T2, a third end T3, and a fourth end T4. Each end point can be connected to the end of the extension mechanism 10 and be a support.

Furthermore, the so-called stretching mechanism 10 in the present invention can generally refer to a pair of supporting objects that provide a supporting point or a component of the supporting surface 110S. In this example, the stretching mechanism 10 includes a connecting rod group 110 and a transmission mechanism 120. First, the feasible design of the connecting rod group 110 is explained.

Please refer to FIG. 1 and FIG. 2 together. FIG. 2 is a schematic diagram of some elements of the projection system of the first embodiment of the present invention during the unfolding process of the support frame. It can be seen from the figure that the connecting rod group 110 can be roughly divided into two parts when it is the most simplified, one is mainly used to provide the first scissor type telescopic frame 111, the second scissor type telescopic frame 113 is mainly used for straight To the length of the first mechanism 112 and the second mechanism 114. 2 only shows the design of one side of the connecting rod group 110, and the design of the other side is mirrored along the intermediate axis AS formed by the contact 111A1 and the contact 111B1, so it is omitted. The first scissor telescopic frame 111 is opposite to the second scissor telescopic frame 113, and the first mechanism 112 is opposite to the second mechanism 114. In this example, the first scissor telescopic frame 111 includes three sets of two-link mechanisms connected to each other. Or, in other words, in this example, the first scissor telescopic frame 111 refers to a scissor telescopic frame with three sets of X-shaped connecting rods. More specifically, the first scissor telescopic frame 111 includes six connecting rods. Among the six connecting rods, each of the connecting rods has a head, a tail, and a rod connecting the two in the opposite direction of the connecting rod. unit. The head and tail only represent the relative position between the two connecting rods. Each link includes three contacts, called head contacts, middle contacts, and tail contacts. The head contacts are close to or located at the head, the tail contacts are close to or located at the tail, and the head contacts and tail contacts The point does not necessarily need to be located at the extreme end of the link. The middle contact is located between the head contact and the tail contact. In this example, the distances between the head contacts, the middle contacts and the tail contacts of the six connecting rods in the first scissor telescopic frame 111 are the same. The relative relationship of the connecting rods in the first scissor telescopic frame 111 in this example will be described below.

First, it can be seen from FIG. 1 that the middle joints 111A2 and 111B2 of the connecting rod 111A and the connecting rod 111B are pivotally connected to each other. The pivotal connection between two joints means that the two joints are rotatably connected to each other by an external movable connection or by the protrusions and recesses of the connecting rod itself. The movable connection or structure can be It is axial. The pivot connection mentioned below assumes that there is an element or structure between the two and will not be repeated. The head contact point of the connecting rod 111C is pivotally connected to the tail contact point of the connecting rod 111A, the head contact point of the connecting rod 111D is pivoted to the tail contact point of the connecting rod 111B, and the middle contact point of the connecting rod 111C is pivoted to the middle connection point of the connecting rod 111D. The points are pivoted and staggered. Similarly, the head contact of the connecting rod 111E is pivotally connected to the tail contact of the connecting rod 111C, the head contact of the connecting rod 111F is pivoted to the tail contact of the connecting rod 111D, and the middle contact of the connecting rod 111E is pivoted to the connecting rod. The contact points of 111F are pivotally connected to each other and staggered. Thus, the above six connecting rods become a scissor telescopic frame.

Please refer to FIG. 6, which depicts a schematic diagram of the unfolding process of the first scissor telescopic frame 111 in the first embodiment of the present invention. In order to make the drawing easier to observe, parts such as the projection lens 32 of the projector 30 and the first mechanism 112 are hidden in the figure. It can be seen from the figure that in the first scissor telescopic frame 111 in this example, the connecting rods respectively form a parallelogram. When the distance between the head contact points 111A1 and 111B1 of the connecting rod 111A and the connecting rod 111B is reduced, the distance between the head contact points 111E1 and 111F1 of the connecting rod 111E and the connecting rod 111F will also be reduced by the same distance. When the distance is reduced, the lateral angle between the two link mechanisms, for example, the angle between the head contact 111A1 of the connecting rod 111A, the middle contact 111A2 and the head contact 111B1 of the connecting rod 111B, will follow And reduce. That is, each link will tend to be horizontal, and correspondingly, the total length in the horizontal direction will increase accordingly. The above is one of the feasible designs of the first scissor telescopic frame 111. In practical applications, the number of X-shaped connecting rod groups 110 of the scissor telescopic frame is not limited to three groups. It can also be one set or two or more X-shaped connecting rod groups 110. 4 groups and 5 groups, etc. X-type connecting rod group 110 can be used.

On the other hand, in this example, the first mechanism 112 includes seven connecting rods, which are 112A to 112G. With the cooperation of the seven connecting rods, it can be linked with the first scissor telescopic frame 111 and develop in a height direction.

Please refer to FIGS. 2, 4 and 5 together. FIGS. 4 and 5 respectively illustrate schematic diagrams of the connecting rod assembly 110 in different states in an embodiment of the present invention. In this example, the connecting rod 112A has a head contact 112A1 and a tail contact 112A2. There is a sliding groove 112AZ extending from the head contact to the tail contact between the head contact 112A1 and the tail contact 112A2. The tail joint 112A2 of the connecting rod 112A is simultaneously pivotally connected to the tail joint of the connecting rod 111D in the first scissor telescopic frame 111 and the head joint 111F1 of the connecting rod 111F; and the connecting rod in the first scissor telescopic frame 111 A protrusion is provided at the pivotal joint between the tail contact of 111C and the head contact of connecting rod 111E, and the protrusion is movably embedded in the sliding groove 112AZ of connecting rod 112B. It should be noted that when referring to bumps and sliding grooves in the present invention, it is necessary to know that the bumps and sliding grooves are interchangeable. The bumps can be replaced by sliders, sliding sleeves, or other clips or fasteners; and the sliding grooves can be slide rails, grooves, through slots or other sliding directions with guiding bumps, sliders, sliding sleeves, etc. Any one of the structure. The convex block and the sliding groove can be called the second moving part and the first sliding part, and the first sliding part and the second sliding part can be slid relative to each other, and both of them must be the cooperation of any of the aforementioned elements.

Please also refer to Figure 4, the head end of the connecting rod 112B has three head contacts 112B1, 112B2, 112B3, and its tail end is engraved with a tail contact 112B4, and each head contact 112B1, 112B2, 112B3 and tail contact 112B4 There is a chute 112BZ between them. The three head contacts at the head end are respectively called the first head contact 112B1, the second head contact 112B2, and the third head contact 112B3 in sequence. The tail joint 112B4 of the connecting rod 112B is pivotally connected to the tail joint of the connecting rod 111E in the first scissor telescopic frame 111; a bump is provided at the tail joint of the connecting rod 111F of the first scissor telescopic frame 111, and The bump is movably embedded in the sliding groove 112BZ of the connecting rod 112B. The connecting rod 112B is preferably not a straight line, but the second head contact 112B2 is slightly folded to make the first head contact 112B1 deform toward the connecting rod 112E. From another point of view, the direction between the first head contact 112B1 and the second head contact 112B2 is defined as the first vector V1, The second vector V2 is defined between the second head contact 112B2 and the tail contact 112B4. There is an internal angle Φ between the first vector V1 and the second vector V2. When the internal angle Φ is greater than 0 degrees and less than 30 degrees, The problem that the connecting rod 112E cannot rotate under force when the first mechanism 112 is deployed can be prevented to a certain extent. In other words, when the connecting rod 112E and the connecting rod 112B are fully deployed, the two connecting rods should be avoided on the same extension line to maintain their moment arms during rotation. The aforementioned inner included angle Φ is recommended to be less than 180 degrees. In this example, the inner angle Φ is about 12 degrees. The connecting rod 112C and the connecting rod 112D should preferably avoid forming a straight line during the deployment of the system, so as to prevent the aforementioned two from locking during deployment and storage. For this reason, the inner angle between the connecting rod 112C and the connecting rod 112D should also be less than 180 degrees when the system is fully deployed. Or, preferably, it should be less than 170 degrees.

The connecting rod 112C of the first mechanism 112 has a head contact 112C1, a middle contact 112C2, and a tail contact 112C3. There is a sliding groove 112CZ between the middle contact 112C2 and the tail end, which is the tail contact 112C3. The extending direction of the sliding groove 112CZ is the same as the length direction of the connecting rod 112C, that is, it extends from the middle joint to the tail end. The head contact 112C1 of the link 112C is coupled to the tail contact 112C2 of the link 112D, and the middle contact 112C2 of the link 112C is coupled to the third head contact 112B3 of the link 112B. The tail contact 112C3 is located in the chute 112CZ and is movably connected to the second tail contact 112E3 of the connecting rod 112E. The connecting rod 112C is substantially parallel to the connecting rod 111F of the first scissor telescopic frame 111.

The connecting rod 112D has a head contact 112D1 and a tail contact 112D2. The head contact 112D1 of the connecting rod 112D is pivotally connected to the head contact 112A1 of the connecting rod 112A1, and the tail contact 112D2 of the connecting rod 112D is connected to the head contact 112C1 of the connecting rod 112C. . The connecting rod 112D and the connecting rod 111E of the first scissor telescopic frame 111 are substantially parallel.

The connecting rod 112E has a head contact 112E1, a first tail contact 112E2, and a second tail contact 112E3. The head contact 112E1 of the connecting rod 112E is pivotally connected to the first tail contact 112G1 of the connecting rod 112G, and the first tail contact 112E1 of the connecting rod 112E is pivoted to the first head contact 112B1 of the connecting rod 112B. The second tail contact 112E2 of the connecting rod 112E has a bump which is movably embedded in the sliding groove 112CZ of the connecting rod 112C. Connecting rod 112E The head end of the rod is bent toward the connecting rod 112G, and the rod body at the tail end of the connecting rod 112E and the first tail contact 112E2 and the second tail contact 112E3 are triangular in shape. Most of the connecting rod 112E from the head end to the tail end (called the rod body) is parallel to the connecting rod 112F.

The connecting rod 112F has a head contact 112F1 and a tail contact 112F2. The head contact 112F1 of the connecting rod 112F is pivotally connected to the second tail contact 112G2 of the connecting rod 112G, and the tail contact 112F2 of the connecting rod 112F is pivoted to the second head contact 112B2 of the connecting rod 112B. The head end of the connecting rod 112F is bent toward the connecting rod 112G, and the bending direction is opposite to the direction in which the head end of the connecting rod 112E is bent. The tail end of the connecting rod 112F is bent toward the connecting rod 112B and the connecting rod 112E, and the bending angle thereof is the same as the bending angle of the head end 112E1 of the connecting rod 112E. Most of the rod body of the connecting rod 112F is parallel to the connecting rod 112E.

The connecting rod 112G has a first tail contact 112G1 and a second tail contact 112G2. The first tail contact 112G1 is pivotally connected to the head contact 112E1 of the connecting rod 112E. The second tail contact 112G2 is pivotally connected to the head contact 112F1 of the connecting rod 112F. The direction between the first tail contact 112G1 and the second tail contact 112G2 of the connecting rod 112G and the rod body form a small inner angle Φ less than 20 degrees. When the inner included angle Φ is greater than 3 degrees and less than 15 degrees, it can be prevented to a certain extent that the connecting rod 112G and the connecting rod 112B are in a straight line and cannot rotate with force when the first mechanism 112 is deployed. The aforementioned inner included angle Φ is preferably 5 to 13 degrees, and 9 to 12 degrees is the best. In this example, the inner included angle Φ is about 12 degrees. In addition, during operation, the connecting rod 112G and the connecting rods 112A and 112B are substantially horizontal.

The operation mode of the first mechanism 112 will be described below. When the distance between the head contacts 111A1 and 111B1 of the connecting rod 111A and the connecting rod 111B is reduced, the distance between the head contacts 111E1 and 111F1 of the connecting rod 111E and the connecting rod 111F will also be reduced by the same distance. At the same time, the horizontal distance between the connecting rod 112A and the connecting rod 112B will increase accordingly. The angle between the connecting rod 112C and the connecting rod 112D will decrease accordingly and tend to be flat. At the same time, the head end of the connecting rod 112C moves, and the third head contact 112B3 of the connecting rod 112B is used as a fulcrum, and the tail end of the connecting rod 112C rotates in the reverse axial direction. In this example, when the connecting rod 112B is below the connecting rod 112G, and the connecting rod 112B is When the connecting rod 112A is on the left, during the unfolding process, the tail contact 112E3 of the connecting rod 112C rotates counterclockwise with the middle contact 112E2 as the fulcrum. When converging, the connecting rod 112C rotates clockwise in the opposite direction. At the same time, when unfolding, the inner wall of the sliding groove 112CZ of the connecting rod 112C will exert a force on the second tail contact 112E2 of the connecting rod 112E, and the second tail contact 112E2 of the connecting rod 112E will be the first tail contact 112E2 The fulcrum is rotated in the axial direction, and the head contact 11E1 at the head end of the connecting rod 112E is rotated counterclockwise. On the other hand, the connecting rod 112B, the connecting rod 112E, the connecting rod 112F, and the connecting rod 112G can be regarded as a four-bar structure with their four contact points 112E1, 112E2, 112F1, 112F2.

For ease of understanding, it can be assumed that the connecting rod 112B is relatively fixed, and the four connecting rods of the connecting rod 112B, the connecting rod 112E, the connecting rod 112F and the connecting rod 112G are in a parallelogram structure according to their joints. When the connecting rod 112E2 rotates under force, the connecting rod 112F will also rotate correspondingly according to the characteristics of the four-bar linkage. At the same time, the angle between the first tail contact 112G1 and the second tail contact 112G2 of the connecting rod 112G will remain the same as the first head contact 112B1 and the second head contact 112B2 of the connecting rod 112B. The connection makes the angle of the connecting rod 112G in the process of unfolding and converging the same as or substantially horizontal to the connecting rod 112B. Thereby, the first mechanism 112 can provide a bearing surface 110S in a height direction. In addition, in this example, the connecting rods in the aforementioned connecting rod group 110 are in the same plane, or, in other words, the connecting rods all act on a two-dimensional plane.

The design of the transmission mechanism will be explained below. Please refer to the diagrams in Figure 2, Figure 6, and Figure 7. Figures 6 and 7 respectively depict schematic diagrams of the first embodiment of the present invention at different viewing angles and at different time points. In order to make the drawing more concise, some elements such as the projection lens 32 will be omitted. In the embodiment of FIG. 6, the transmission mechanism 120 includes a motor 122 (not shown) and a transmission mechanism 121 that is linked with the shaft of the motor 122. The motor 122 is placed inside the casing 31, and the transmission mechanism 121 is partially exposed through a hole of the casing 31. In this example, the transmission mechanism 121 and the connecting rod group 110 are substantially horizontally arranged on the surface of the housing 31 of the projector 30 when not in operation. After the motor 122 is started, it will be connected to the transmission part 121 through a transmission device such as a transmission gear. Drive it. The transmission mechanism 121 is pivotally connected to a joint on the surface of the projector 30 in this example. When driving, the head end of the transmission mechanism 121 moves in a circular motion along the joint and rotates in the direction of the connecting rod group 110. The head end of the transmission element 121 is coupled to the head end of the connecting rod 111A of the first scissor telescopic frame 111 of the connecting rod group 110. In this example, the rotation direction of the transmission component 121 relative to the housing 31 is the first axis D1, and the second axis D2 is perpendicular to the first axis D1. More specifically, the head end of the transmission mechanism 121 has a rotary joint 312. The rotary joint 312 has a protrusion with a plane protruding for the head end of the connecting rod 111A to carry, and the normal vector direction of the plane has a shaft, and the plane is pivoted to the connecting rod 111A by the shaft. The plane is substantially parallel to the housing 31 when in the stored state. The aforementioned hole allows the connecting rod 111A to rotate along the first axis D1 and the second axis D2 at the same time. In this example, the rotation axis of the tail end of the transmission member 121 is consistent with the axis of the steering joint at the edge of the housing 31, but the axis of the transmission member 121 is lower than the steering joint at the edge of the housing 31. Referring to FIG. 7, in the stored state, the connecting rod group 110 is respectively connected to the head end of the transmission component 121 and the steering joint at the edge of the housing 31, and the connecting rod group 110 is substantially parallel to the surface of the housing 31. At this time, the transmission mechanism 121 is slightly inclined. In this example, the angle between the transmission mechanism 121 and the housing 31 is less than 10 degrees, more specifically, about 4 degrees. In the fully expanded state, the included angle between the transmission mechanism 121 and the housing 31 is slightly less than 180 degrees, more specifically, between 150 and 170 degrees. In this example, the included angle is about 161.5 degrees. The complementary angle is 18.5 degrees. In this example, the minimum projection angle (relative to the bottom edge of the screen) of the projection lens 32 of the projector 30 is approximately 20 degrees of the aforementioned included angle, that is, the transmission mechanism 121 does not affect the playback of the projection screen.

Another design of the transmission mechanism will be explained below. Compared to the aforementioned integrated structure of the transmission mechanism 121, the transmission mechanism can also drive the rotation and extension of the linkage group 110 with unused mechanisms. For example, in the second embodiment, regarding the actuating part of the transmission mechanism that rotates the linkage group 110, the transmission shaft of the motor 122 of the transmission mechanism and the linkage group 110 are linked at the first fixed end point P1. More specifically, the transmission shaft system of the motor 122 uses, for example, a gear set to drive the rotating shaft to change The angle between the connecting rod group 110 and the casing is changed. A set of telescopic hydraulic rods can be connected between the head end of the connecting rod 111A and the head end of the connecting rod 111B, and the hydraulic telescopic rod power is provided by an external hydraulic pump to extend or contract. In addition to the aforementioned hydraulic telescopic rods, various mechanisms or components, such as springs, steel cables, electric telescopic arms, etc., that can both control the distance between the head end of the connecting rod 111A and the head end of the connecting rod 111B, and the like Cooperate.

The following describes the design of the present invention from another perspective. Please refer to Figures 1 to 7. As can be seen from the figures, it includes a projection screen, a scissor telescopic frame, a first mechanism and a second mechanism. A projection screen 20 includes a first end area T1 and a second end area T2. Scissor telescopic frames 111 and 113 can be extended along a first direction D1. Scissor telescopic frames include a scissor telescopic frame first link 111F, a scissor telescopic frame second link 111E, and a scissor telescopic frame second link. Three connecting rods 113F and a fourth connecting rod 113E of a scissor telescopic frame, the first end of the first connecting rod 111F of the scissor telescopic frame is provided with a first contact point at the first end, and the third connecting rod 113F of the scissor telescopic frame The first end is provided with a first end first contact point.

A first mechanism 112, including a first mechanism first link 112C, a first mechanism second link 112D, and a first mechanism third link 112E, a first mechanism of the first link 112C One end is provided with a first contact point and a second contact point. The first end of the third link 112E of the first mechanism is provided with a first contact point; the first link 112C of the first mechanism has a first contact point and a scissor type The first contact point of the first end of the first link 111F of the telescopic frame is connected. The second end of the first link 112C of the first mechanism is connected to one end of the second link 112D of the first mechanism. The other end is connected to one end of the first link 111E of the scissor telescopic frame, the first end of the first link 112C of the first mechanism is connected to the first end of the second contact point, and the first mechanism third link 112E is connected to the first end of the first contact point , And the other end of the third link 112E of the first mechanism is linked with the first end area of the projection screen.

The second mechanism 114 includes a first link of a second mechanism 114, a second link of a second mechanism 114, a third link of a second mechanism 114, and a first end of the first link of the second mechanism 114 There is a first contact point and a second contact point. The first end of the third link of the second mechanism 114 is provided with a first connection Contact; a second mechanism 114 first connecting rod with the first contact point and the first contact point of the first end of the scissor telescopic frame third connecting rod 113F, the second mechanism 114 and the second end of the first connecting rod One end of the second link of the second mechanism 114 is connected, the other end of the second link of the second mechanism 114 is connected to one end of the fourth link 113E of the scissor telescopic frame, the first end of the first link of the second mechanism 114 is second The contact point is connected to the first contact point of the first end of the third link of the second mechanism 114, and the other end of the third link of the second mechanism 114 is linked with the second end area of the projection screen. The first connecting rod 111F of the scissor telescopic frame and the first connecting rod 111E of the scissor telescopic frame each have a middle contact point, and the middle contact point of the first connecting rod 111F of the scissor telescopic frame and the first connecting rod 111E of the scissor telescopic frame The middle contact point is a pivotal connection. From another perspective, this example can be viewed as changing the contact 112D1 of the connecting rod 112D in FIG. 1 to the contact 111E1 of the connecting rod 111E. Then, the connection point of the connecting rod 112C and the connecting rod 112B in FIG. 1 is changed to be pivotally connected to the tail end of the connecting rod 111F. In this way, the connecting rods 112A and 112B can be omitted.

Another embodiment is presented below. In this embodiment, the projection screen 20, the scissor telescopic frame, the first mechanism and the second mechanism are still provided. The first mechanism and the second mechanism are mirrored. The scissor telescopic frame can be extended in a first direction D1. The scissor telescopic frame includes a scissor telescopic frame first link 112B, a scissor telescopic frame second link 112A, and a scissor telescopic frame third link And a fourth connecting rod with a scissor telescopic frame. The third connecting rod of the scissor telescopic frame and the fourth connecting rod of the scissor telescopic frame and the first connecting rod of the scissor telescopic frame and the second connecting rod of the scissor telescopic frame are mirrored and will not be repeated. The first end of the first link 112B of the scissor telescopic frame is provided with a first end first contact point, and the first end of the third link of the scissor telescopic frame is provided with a first end first contact point. The first mechanism includes a first mechanism first link 112C, a first mechanism second link D, and a first mechanism third link 112E. A first end of the first mechanism first link 112C is provided There is a first contact point and a second contact point. The first end of the third link 112E of the first mechanism is provided with a first contact point; the first link 112C of the first mechanism is connected to the scissor telescopic frame at the first contact point. The first contact point of the first end of the first link is connected, and the second end of the first link 112C of the first mechanism is connected to One end of the second link D of the first mechanism is connected, the other end of the second link D of the first mechanism is connected to one end of the second link 112A of the scissor telescopic frame, and the first end of the first link 112C of the first mechanism is the second The contact point is connected with the first contact point of the first end of the third link of the first mechanism, and the other end of the third link 112E of the first mechanism is linked with the first end area of the projection screen; the second mechanism includes a second A first link of a mechanism, a second link of a second mechanism, and a third link of a second mechanism. A first end of the first link of the second mechanism is provided with a first contact point and a second contact point, The first end of the third link of the second mechanism is provided with a first contact point; the first link of a second mechanism is connected with the first contact point of the first end of the third link of the scissor telescopic frame at the first contact point, The second end of the first link of the second mechanism is connected with one end of the second link of the second mechanism, and the other end of the second link of the second mechanism is connected with one end of the fourth link of the scissor telescopic frame. The second contact point at the first end of the connecting rod is connected with the first contact point at the first end of the third connecting rod of the second mechanism, and the other end of the third connecting rod of the second mechanism is linked with the second end area of the projection screen. The first connecting rod 112B of the scissor telescopic frame and the second connecting rod 112A of the scissor telescopic frame are substantially parallel; and the first end of the first connecting rod 112B of the first scissor telescopic frame is provided with a first contact point, and The first link 112C of the first mechanism is connected at a first contact point.

Furthermore, the present invention also proposes another specific embodiment, please refer to FIG. 8. It can be seen from the figure that it includes a first telescopic rod 40, a second telescopic rod 50, a first mechanism 112 and a second mechanism 114. The first telescopic rod 40 and the second telescopic rod 50 are mirrored, and the first mechanism 112 and the second mechanism 114 are mirrored. A first telescopic rod 40 is provided with a first telescopic rod first tube 41 and a first telescopic rod first connecting rod 42. The first telescopic rod first connecting rod 42 can be sleeved on the first telescopic rod first tube 41 The first telescopic rod and the first connecting rod 42 can extend in a first direction; the first telescopic rod first tube 41 is provided with a first contact point of the first telescopic rod 40, and the first telescopic rod is the first connecting rod The rod 42 is provided with a first telescopic rod 40 with a second contact point. A second telescopic rod 50, provided with a second telescopic rod 50, the first tube and the second telescopic rod 50 first connecting rod, the second telescopic rod 50 first connecting rod The rod can be sleeved in the first tube of the second telescopic rod 50, and the first connecting rod of the second telescopic rod 50 can extend in a second direction, and the second direction is substantially opposite to the first direction; the second telescopic rod 50 On the first tube, a second telescopic rod 50 is provided with a first contact point, and the second telescopic rod 50 is provided with a first connecting rod, and a second telescopic rod 50 is provided with a second contact point; the first mechanism 112 includes a A first mechanism link 112C, a first mechanism second link 112D, and a first mechanism third link 112E. A first end of the first mechanism first link 112C is provided with a first contact point and a The second contact point, the first end of the third link 112E of the first mechanism, is provided with a first contact point; the first link 112C of a first mechanism is connected with the first contact point of the first telescopic rod 40 at the first contact point , The second end of the first link 112C of the first mechanism is connected with one end of the second link 112D of the first mechanism, and the other end of the second link 112D of the first mechanism is connected with the second contact point of the first telescopic rod 40. The first end second contact point of the first link 112C of a mechanism is connected to the first contact point of the first end of the third link 112E of the first mechanism, and the other end of the third link 112E of the first mechanism is connected to the second contact point of the projection screen. One end area is linked; the second mechanism 114 includes a second mechanism 114 first link, a second mechanism 114 second link, and a second mechanism 114 third link, second mechanism 114 first link A first end of the rod is provided with a first contact point and a second contact point. The first end of the third connecting rod of the second mechanism 114 is provided with a first contact point; the first connecting rod of a second mechanism 114 has a first contact point. The contact point is connected to the first contact point of the first telescopic rod 40, the second end of the first link of the second mechanism 114 is connected to one end of the second link of the second mechanism 114, and the other end of the second link of the second mechanism 114 Is connected to the second contact point of the second telescopic rod 50, the second contact point of the first end of the first link of the second mechanism 114 is connected to the first contact point of the first end of the third link of the second mechanism 114, and The other end of the third link of the second mechanism 114 is linked with the second end area of the projection screen. In addition, the first end of the first link 112C of the first mechanism is provided with a groove, and the second contact point of the first link 112C of the first mechanism is set in the groove; the first end of the third link 112E of the first mechanism , Is provided with a second contact point, and the second end of the third link 112E of the first mechanism is provided with a The third contact point, and the first mechanism further includes: a fourth link 112G of the first mechanism, a first contact point is provided at the first end of the fourth link of the first mechanism, and the fourth link of the first mechanism Two ends are provided with a second contact point, the first contact point of the fourth link of the first mechanism is linked with the second contact point of the third link 112E of the first mechanism; and a fifth link 112F of the first mechanism. The first end of the fifth link 112F of the mechanism is provided with a first contact point and a second contact point, and the first end of the fifth link 112F of the first mechanism is provided with a third contact point; The first contact point of the rod 112F is connected to the third contact point of the third link 112E of the first mechanism, and the second contact point of the fifth link 112F of the first mechanism is connected to the second contact point of the fourth link of the first mechanism.

The following describes the design of the present invention from another perspective. Please refer to Figures 1 to 7. As can be seen from the figures, it includes a projection screen, a scissor telescopic frame, a first mechanism and a second mechanism. The first mechanism and the second mechanism are mirrored.

An extension mechanism, including a scissor telescopic frame, a first mechanism 112, a second mechanism 114, a motor, a base, and a transmission mechanism. A scissor telescopic frame can be extended in a first direction. The scissor telescopic frame includes a scissor telescopic frame first link 111F, a scissor telescopic frame second link 111E, and a scissor telescopic frame third link With a fourth connecting rod of a scissor telescopic frame, the first end of the first connecting rod 111F of the scissor telescopic frame is provided with a first contact point of the first end, and the first end of the third connecting rod of the scissor telescopic frame is provided with There is a first end first contact point; a first mechanism 112, including a first mechanism first link 112C, a first mechanism second link 112D, and a first mechanism third link 112F, the first mechanism A first end of the first link 112C is provided with a first contact point and a second contact point, the first end of the third link 112F of the first mechanism is provided with a first contact point; a first link of the first mechanism 112C is connected with the first contact point of the first end of the first link of the scissor telescopic frame by a first contact point. The second end of the first link 112C of the first mechanism is connected to one end of the second link 112D of the first mechanism. The other end of the second link 112D of a mechanism is connected to one end of the second link 111E of the scissor telescopic frame, and the first link 112C of the first mechanism The second contact point of the end is connected to the first contact point of the first end of the third link of the first mechanism 112; the second mechanism 114 includes a first link of a second mechanism 114 and a second link of a second mechanism 114, And a third link of the second mechanism 114, a first end of the first link of the second mechanism 114 is provided with a first contact point and a second contact point, and the first end of the third link of the second mechanism 114 is provided with There is a first contact point; the first link of a second mechanism 114 is connected to the first contact point of the first end of the third link of the scissor telescopic frame at the first contact point. The second mechanism 114 is the second link of the first link The end is connected to one end of the second link of the second mechanism 114, the other end of the second link of the second mechanism 114 is connected to one end of the fourth link of the scissor telescopic frame, and the first end of the first link of the second mechanism 114 is the second Two contact points, connected with the first contact point of the first end of the third link of the second mechanism 114, the first end of the first link 112C of the first mechanism is provided with a slot, and the second mechanism of the first link 112C is The contact point is set in the groove; the first end of the third link 112F of the first mechanism is provided with a second contact point, and the second end of the third link 112F of the first mechanism is provided with a third contact point, and The first mechanism 112 further includes: a fourth link 112G of the first mechanism, a first contact point is provided at the first end of the fourth link 112G of the first mechanism, and a second end of the fourth link 112G of the first mechanism. There is a second contact point, the first contact point of the fourth link 112G of the first mechanism is linked with the second contact point of the third link 112F of the first mechanism; a fifth link 112F of the first mechanism, the fifth link of the first mechanism The first end of the connecting rod 112F is provided with a first contact point and a second contact point, and the first end of the fifth connecting rod 112F of the first mechanism is provided with a third contact point; The first contact point is connected to the third contact point of the third link 112F of the first mechanism, and the second contact point of the fifth link 112F of the first mechanism is connected to the second contact point of the fourth link 112G of the first mechanism. A base 311 connected to a first fixed end point P1 of the scissor telescopic frame; a transmission mechanism 121 connected to a second fixed end point P2 of the scissor telescopic frame; and a motor 122, the motor 122 and the transmission machine One end of the piece 121 is connected.

In one example of the present invention, it has the function of expanding the projection screen into a two-dimensional plane in multiple directions. In another example, after connecting the transmission mechanism and a power source such as a motor, it has to have an automatic deployment function. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

1: Projection system

10: Stretching mechanism

110: connecting rod group

110S: bearing surface

111: The first scissor telescopic frame

112: The first institution

113: The second scissor telescopic frame

114: second organization

120: Transmission mechanism

121: drive mechanism

122: Motor

20: Carrier

30: Projector

31: Shell

311: Pedestal

312: Rotary joint

32: Projection lens

33: light outlet

P1: The first fixed end point

P2: second fixed end point

T1: first endpoint

T2: second terminal

T3: third terminal

T4: Fourth terminal

Claims (10)

A projection system includes: a projection screen including a first end area and a second end area; a scissor telescopic frame that can extend in a first direction; the scissor telescopic frame includes a scissor telescopic frame first Connecting rod, a second connecting rod of a scissor telescopic frame, a third connecting rod of a scissor telescopic frame, and a fourth connecting rod of a scissor telescopic frame. The first end of the first connecting rod of the scissor telescopic frame is provided with a One end has a first contact point, and the first end of the third link of the scissor telescopic frame is provided with a first end first contact point; a first mechanism including a first mechanism, a first link, and a first The second link of the mechanism and the third link of the first mechanism. A first end of the first link of the first mechanism is provided with a first contact point and a second contact point. The third link of the first mechanism The first end is provided with a first contact point; the first connecting rod of the first mechanism is connected with the first contact point of the first end of the first connecting rod of the scissor telescopic frame by the first contact point, and the first The second end of the first link of the mechanism is connected with one end of the second link of the first mechanism, and the other end of the second link of the first mechanism is connected with one end of the second link of the scissor telescopic frame. The first mechanism The first end second contact point of the first link is connected to the first contact point of the first end of the third link of the first mechanism, and the other end of the third link of the first mechanism is connected to the first end of the projection screen Point area linkage; and a second mechanism, including a first link of a second mechanism, a second link of a second mechanism, and a third link of a second mechanism, a first link of the first link of the second mechanism The end is provided with a first contact point and a second contact point, the first end of the third link of the second mechanism is provided with a first contact point; the first link of the second mechanism is connected with the first contact point through the first contact point The first contact point of the first end of the third link of the scissor telescopic frame is connected, the second end of the first link of the second mechanism is connected to one end of the second link of the second mechanism, and the second link of the second mechanism is connected The other end of the rod is connected with one end of the fourth link of the scissor telescopic frame, and the first end of the first link of the second mechanism is in first contact with the first end of the third link of the second mechanism. Point to connect And the other end of the third link of the second mechanism is linked with the second end area of the projection screen. The projection system according to claim 1, wherein the first link of the scissor-type telescopic frame and the second link of the scissor-type telescopic frame are each provided with a mid-section contact point, and the first link of the scissor-type telescopic frame The middle section contact point is in a pivotal relationship with the middle section contact point of the second connecting rod of the scissor telescopic frame. The projection system according to claim 1, wherein the first link of the scissor-type telescopic frame and the second link of the scissor-type telescopic frame are substantially parallel; and the first link of the first scissor-type telescopic frame The first end is provided with a first contact point, which is connected with the first contact point of the first connecting rod of the first mechanism. The projection system according to claim 1, further comprising: a base connected to the scissor telescopic frame with a first fixed end point; and a transmission mechanism connected to the scissor telescopic frame with a first fixed end point; 2. Fixed terminal connection. The projection system according to claim 1, further comprising a motor and a transmission mechanism, and the motor is connected to one end of the transmission mechanism. A projection system includes: a first telescopic rod, a first tube of a first telescopic rod and a first connecting rod of the first telescopic rod, the first connecting rod of the first telescopic rod can be sleeved on the first telescopic rod In a tube, and the first connecting rod of the first telescopic rod can extend in a first direction; the first tube of the first telescopic rod is provided with a first contact point of the first telescopic rod, and the first telescopic rod A connecting rod is provided with a first telescopic rod and a second contact point; a second telescopic rod is provided with a second telescopic rod, the first tube and the second telescopic rod, the first connecting rod, the second telescopic rod, the first connecting rod It can be sleeved in the first tube of the second telescopic rod, and the first connecting rod of the second telescopic rod can extend in a second direction, and the second direction is substantially opposite to the first direction; the second The first tube of the telescopic rod is provided with a second telescopic rod A contact point, and the second telescopic rod first connecting rod is provided with a second telescopic rod second contact point; the first mechanism includes a first mechanism first connecting rod, a first mechanism second connecting rod, And a third link of the first mechanism, a first end of the first link of the first mechanism is provided with a first contact point and a second contact point, and the first end of the third link of the first mechanism is provided with The first contact point; the first connecting rod of the first mechanism is connected with the first contact point of the first telescopic rod by the first contact point, the second end of the first connecting rod of the first mechanism and the first mechanism One end of the second link is connected, and the other end of the second link of the first mechanism is connected to the second contact point of the first telescopic rod. The first end of the first link of the first mechanism and the second contact point are connected to the first The first end of the third link of the mechanism is connected with the first contact point, and the other end of the third link of the first mechanism is linked with the first end area of the projection screen; and the second mechanism includes a second mechanism first Connecting rod, a second connecting rod of a second mechanism, and a third connecting rod of a second mechanism. A first end of the first connecting rod of the second mechanism is provided with a first contact point and a second contact point. The first end of the third link of the two mechanisms is provided with a first contact point; the first link of the second mechanism is connected with the first contact point of the first telescopic rod by the first contact point, and the second mechanism The second end of a link is connected to one end of the second link of the second mechanism, the other end of the second link of the second mechanism is connected to the second contact point of the second telescopic rod, and the first link of the second mechanism The second contact point of the first end of the rod is connected to the first contact point of the first end of the third link of the second mechanism, and the other end of the third link of the second mechanism is linked with the second end area of the projection screen . The projection system according to claim 1 or 6, wherein the first end of the first link of the first mechanism is provided with a groove, and the second contact point of the first link of the first mechanism is provided In the groove; the first end of the third link of the first mechanism is provided with a second contact point, and the second end of the third link of the first mechanism is provided with a third contact point, and the first mechanism It further includes: A fourth link of the first mechanism, the first end of the fourth link of the first mechanism is provided with a first contact point, the second end of the fourth link of the first mechanism is provided with a second contact point, the first The first contact point of the fourth link of the mechanism is linked with the second contact point of the third link of the first mechanism; a fifth link of the first mechanism, the first end of the fifth link of the first mechanism is provided with a A contact point and a second contact point, and the first end of the fifth link of the first mechanism is provided with a third contact point; the first contact point of the fifth link of the first mechanism and the first mechanism The third contact point of the three links is connected, and the second contact point of the fifth link of the first mechanism is connected to the second contact point of the fourth link of the first mechanism. An extension mechanism, including: a scissor telescopic frame that can be extended in a first direction, the scissor telescopic frame includes a scissor telescopic frame first link, a scissor telescopic frame second link, and a scissor telescopic frame The third link of the scissor-type telescopic frame and the fourth link of the scissor-type telescopic frame, the first end of the first link of the scissor-type telescopic frame is provided with a first end first contact point, and the third link of the scissor-type telescopic frame The first end is provided with a first end first contact point; a first mechanism includes a first linkage of the first mechanism, a second linkage of the first mechanism, and a third linkage of the first mechanism. A first end of the first connecting rod of the first mechanism is provided with a first contact point and a second contact point, the first end of the third connecting rod of the first mechanism is provided with a first contact point; A connecting rod is connected with the first contact point of the first end of the first connecting rod of the scissor telescopic frame by the first contact point, and the second end of the first connecting rod of the first mechanism is connected secondly with the first mechanism One end of the rod is connected, the other end of the second link of the first mechanism is connected to one end of the second link of the scissor telescopic frame, the first end of the first link of the first mechanism has a second contact point, and the first mechanism The first end of the third link is connected with the first contact point; the second mechanism includes a first link of a second mechanism, a second link of a second mechanism, and a third link of a second mechanism. A first end of the first link of the mechanism is provided with a first connection The contact point and a second contact point, the first end of the third link of the second mechanism is provided with a first contact point; the first link of the second mechanism is connected to the scissor telescopic frame at the first contact point The first contact point of the first end of the third link is connected, the second end of the first link of the second mechanism is connected to one end of the second link of the second mechanism, and the other end of the second link of the second mechanism is connected to One end of the fourth link of the scissor-type telescopic frame is connected, the first end of the first link of the second mechanism is connected to the second contact point of the first end of the third link of the second mechanism. The first end of the first link of a mechanism is provided with a slot, and the second contact point of the first link of the first mechanism is provided in the slot; the first end of the third link of the first mechanism is provided with a The second contact point, and the second end of the third link of the first mechanism is provided with a third contact point, and the first mechanism further includes: a fourth link of the first mechanism, the fourth link of the first mechanism The first end of the rod is provided with a first contact point, the second end of the fourth link of the first mechanism is provided with a second contact point, the first contact point of the fourth link of the first mechanism and the first mechanism The second contact point of the three links is linked; and a fifth link of a first mechanism. The first end of the fifth link of the first mechanism is provided with a first contact point and a second contact point, and the first mechanism The first end of the fifth link is provided with a third contact point; the first contact point of the fifth link of the first mechanism is connected to the third contact point of the third link of the first mechanism, and the first mechanism is The second contact point of the five link is connected with the second contact point of the fourth link of the first mechanism. The stretching mechanism according to claim 8, further comprising: a base connected to the scissor telescopic frame with a first fixed end point; and a transmission mechanism connected to the scissor telescopic frame with a first fixed end point; 2. Fixed terminal connection. The stretching mechanism according to claim 8, further comprising a motor and a transmission mechanism, and the motor is connected to one end of the transmission mechanism.

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