Projector for volunteer filling training

Abstract

The utility model belongs to the technical field of projection equipment, and discloses a projector for volunteer filling training, which comprises a storage box with an upward opening and a mounting frame capable of extending into the storage box in a sliding manner, a projection main body is supported on the mounting frame, the top of the mounting frame is fixedly connected with a box cover, and the box cover is fixedly connected with a projector. A clamping mechanism used for fixing the projection main body is arranged at the bottom of the box cover, the clamping mechanism comprises a gear rotationally connected with the box cover and two clamping plates symmetrically connected to the bottom of the box cover in a sliding mode, racks are fixedly connected to the two clamping plates, and the two racks are meshed with the two sides of the gear respectively. According to the utility model, the clamping mechanism is arranged, and the engaged racks at the two sides move relatively by rotating the gear, so that the two clamping plates are close to each other and clamp the projection main body, the fixed installation of the projection main body is realized, the operation is simple, and the rapid installation and disassembly of the projection main body can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of projection equipment, and in particular relates to a projector for volunteer application training. Background Art

[0002] A projector is often needed during volunteer application training, but since volunteer application training is only conducted for a part of the year, the projector will be idle for a long time if a fixed hanging method is used. In addition, volunteer application training often needs to be carried out in different locations to face different trainees. The fixed hanging method is not convenient for moving the projector, and the installation process takes a long time. If a movable projection bracket is used to fix the projector, the projector and the projection bracket are mostly transported separately. Then, bolts or straps are still required to fix the projector to the projection bracket before each use. The installation process is more troublesome, and the projection bracket is inconvenient to carry due to its large size. In addition, the projector is often exposed to the air for a long time when being transported or not in use, and dust will gradually accumulate on the projector, affecting heat dissipation, resulting in a reduced service life of the projector. Utility Model Content

[0003] The utility model aims to provide a projector for volunteer application training to solve the problems that the existing projector is troublesome to install and inconvenient to carry and is easy to accumulate dust when idle.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A projector for volunteer application training comprises a storage box with an opening upward and a mounting frame which can be slid into the storage box, a projection body is supported on the mounting frame, a box cover is fixedly connected to the top of the mounting frame, a clamping mechanism for fixing the projection body is provided at the bottom of the box cover, the clamping mechanism comprises a gear rotatably connected to the box cover and two clamping plates symmetrically slidably connected to the bottom of the box cover, racks are fixedly connected to the two clamping plates, and the two racks are respectively meshed with two sides of the gear.

[0006] Preferably, the clamping surface of the clamping plate is arranged to be inclined toward the projection body.

[0007] Preferably, a ratchet wheel coaxially fixed with the gear wheel is rotatably connected in the box cover, a sliding rod slidably matched with the ratchet wheel is slidably connected in the box cover, and a second spring is connected between one end of the sliding rod and the box cover.

[0008] Preferably, the slide bar is an inverted T-shaped structure, one end of the slide bar that cooperates with the ratchet is fixedly connected with a trapezoidal block, and the top of the slide bar slides out of the box cover.

[0009] Preferably, a rotating shaft is rotatably connected to the box cover, the gear and the ratchet are fixedly sleeved on the outside of the rotating shaft, and a hand wheel is fixedly connected to the top of the rotating shaft.

[0010] Preferably, three supporting legs are rotatably connected to the bottom of the mounting frame, a first electric push rod is fixedly installed on the bottom of the mounting frame, a telescopic end of the first electric push rod is fixedly connected to a moving frame, and sliding sleeves are slidably provided on the outer sides of the three supporting legs, and the three sliding sleeves are rotatably connected to the moving frame.

[0011] Preferably, a slot for storing the supporting legs is provided at the bottom of the storage box, and a curved surface that contacts the supporting legs is provided at one end of the slot.

[0012] Preferably, two first connecting rods are symmetrically rotatably connected in the storage box, two connecting balls are symmetrically rotatably connected at the bottom of the mounting frame, and second connecting rods are rotatably connected between the two connecting balls and the two first connecting rods respectively.

[0013] Preferably, two sliders are symmetrically slidably connected in the storage box, a slide groove slidably matched with the slider is provided in the storage box, an inclined surface slidably opposed to the first connecting rod is provided on one side of the slider, and a first spring is connected between the other side of the slider and the storage box.

[0014] Preferably, the three support legs are evenly arranged circumferentially at the bottom of the mounting frame, one of the support legs extends to the rear in the projection direction, and a second electric push rod is connected between the sliding sleeves on the other two support legs and the moving frame.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] (1) The utility model is provided with a clamping mechanism. When the projection body is fixedly installed, it is only necessary to rotate the gear to make the meshing racks on both sides move relative to each other, so that the two clamping plates are close to and clamp the projection body. The inclined clamping surface of the clamping plate can be used to press the projection body onto the mounting frame and make the projection direction face forward, thereby realizing the fixed installation of the projection body. The operation is simple and the projection body can be quickly installed and disassembled.

[0017] (2) The utility model is provided with a first electric push rod, a support leg and a card slot. The three support legs can be expanded outward by contracting the first electric push rod, and the support legs abut against one end of the card slot so that the mounting frame and the storage box are close to each other until the top box cover of the mounting frame and the storage box form a closed space. In this way, the accumulation of dust on the projector can be reduced when the projection body is stored in the closed space, thereby increasing the service life of the projector. In addition, the support legs can be completely contracted into the card slot, so that the device is contracted into a square shape, which is convenient for transportation and carrying.

[0018] (3) When the storage box is closed, the first connecting rod and the second connecting rod shrink and rotate and push the slider to compress the first spring. When the first electric push rod pushes out the telescopic end, the three supporting legs shrink toward the middle. Based on the elastic force of the first spring, the slider is pushed to rotate the first connecting rod and the second connecting rod, so that the mounting frame and the storage box are separated. The supporting legs are always in contact with one end of the card slot, so that the projection body can be slowly and steadily extended out of the storage box, thereby realizing the deployment of the projector.

[0019] (4) The utility model is provided with a second electric push rod. When the projector is unfolded, the entire projection device is supported on a plane by three supporting legs. At this time, the two second electric push rods are simultaneously started to telescope and adjust the front and rear tilt angles of the mounting frame and the projection body, and the two second electric push rods are respectively started to telescope and adjust the left and right tilt angles of the mounting frame and the projection body, thereby realizing automatic adjustment of the projection effect with high adjustment accuracy and fast adjustment speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the first cross-sectional view of the utility model;

[0021] Figure 2 It is a three-dimensional diagram of the utility model;

[0022] Figure 3 It is a second cross-sectional view of the utility model;

[0023] Figure 4 It is the third cross-sectional view of the utility model;

[0024] Figure 5 This is a stereogram of the clamping mechanism assembly of the utility model;

[0025] Figure 6 It is a cross-sectional view of the ratchet assembly of the utility model;

[0026] In the figure: 1-storage box, 2-mounting frame, 3-projection body, 4-box cover, 5-slide rod, 6-rotating shaft, 7-plywood, 8-second connecting rod, 9-first connecting rod, 10-support leg, 11-first electric push rod, 12-moving frame, 13-second electric push rod, 14-sliding sleeve, 15-sliding block, 16-first spring, 17-slot, 18-second spring, 19-ratchet, 20-gear, 21-connecting ball, 22-rack. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 6 As shown, the utility model provides the following technical solutions:

[0029] A projector for volunteer application training includes a storage box 1 with an opening upward and a mounting frame 2 that can be slid into the storage box 1, a projection body 3 is supported on the mounting frame 2, a box cover 4 is fixedly connected to the top of the mounting frame 2, and a clamping mechanism for fixing the projection body 3 is provided at the bottom of the box cover 4, the clamping mechanism includes a gear 20 rotatably connected to the box cover 4 and two clamping plates 7 symmetrically slidably connected to the bottom of the box cover 4, racks 22 are fixedly connected to the two clamping plates 7, and the two racks 22 are respectively meshed with two sides of the gear 20; the clamping surface of the clamping plate 7 is set to be an inclined surface facing the projection body 3.

[0030] Based on the above disclosed structure, when installing the projector:

[0031] First, place the storage box 1 at the projection position, then move the mounting frame 2 upward to the outside of the storage box 1, and then fix the projection body 3 on the mounting frame 2. The specific operation is: place the projection body 3 on the mounting frame 2, and then rotate the gear 20 on the box cover 4 to make the two racks 22 meshing on both sides move relative to each other, so that the two clamping plates 7 are close to each other and abut against the two sides of the projection body 3. Based on the clamping surface of the clamping plate 7 being an inclined surface, the clamping plate 7 applies an oblique downward force to the projection body 3, so that the projection body is pressed tightly on the mounting frame 2, and the projection direction is automatically corrected to the forward direction, thereby completing the installation of the projection body 3. The operation is simple and convenient for the installation, disassembly and maintenance of the projection body 3.

[0032] As mentioned above, regarding the driving and self-locking of the gear 20, it is preferably configured as follows:

[0033] A ratchet 19 coaxially fixed with the gear 20 is rotatably connected in the box cover 4, a slide bar 5 slidably matched with the ratchet 19 is slidably connected in the box cover 4, and a second spring 18 is connected between one end of the slide bar 5 and the box cover 4;

[0034] The slide bar 5 is an inverted T-shaped structure, one end of the slide bar 5 that cooperates with the ratchet 19 is fixedly connected with a trapezoidal block, and the top of the slide bar 5 slides out of the box cover 4;

[0035] The box cover 4 is rotatably connected with a rotating shaft 6, the gear 20 and the ratchet 19 are fixedly sleeved on the outer side of the rotating shaft 6, and the top of the rotating shaft 6 is fixedly connected with a hand wheel.

[0036] As can be seen from the above, when the clamping plate 7 is fixed to clamp the projection body 3, the hand wheel on the rotating shaft 6 drives the rotating shaft 6 to rotate, so that the gear 20 and the ratchet 19 rotate. When the gear 20 rotates to make the two racks 22 drive the two clamping plates 7 to approach each other, the beveled edge of the protrusion on the ratchet 19 and the beveled edge of the trapezoidal block on the slide bar 5 slide relative to each other, so that the slide bar 5 slides in the box cover 4 and compresses the second spring 18. When a ratchet 19 protrusion is rotated, the elastic force of the second spring 18 causes the slide bar 5 to slide and extend into the ratchet 19 again. In the groove, when the two clamping plates 7 clamp the projection body 3, the right-angled side of the trapezoidal block on the slide bar 5 conflicts with the right-angled side of the protruding block on the ratchet 19 to prevent the ratchet 19 from reversing, thereby fixing the gear 20 through the rotating shaft 6, so that the gear 20 can achieve self-locking; when it is necessary to disassemble the projection body 3, it is only necessary to slide the protruding part of the slide bar 5 from above the box cover 4, so that the slide bar 5 compresses the second spring 18 and disengages from the ratchet 19, and at this time, the rotating shaft 6 is rotated in the opposite direction to make the two clamping plates 7 move away from each other, so that the projection body 3 can be quickly disassembled.

[0037] In addition, regarding the contraction and expansion of the projector, it is preferably set to the following structure:

[0038] The bottom of the mounting frame 2 is rotatably connected to three supporting legs 10, a first electric push rod 11 is fixedly installed at the bottom of the mounting frame 2, a mobile frame 12 is fixedly connected to the telescopic end of the first electric push rod 11, and a sliding sleeve 14 is slidably sleeved on the outer sides of the three supporting legs 10, and the three sliding sleeves 14 are rotatably connected to the mobile frame 12;

[0039] The bottom of the storage box 1 is provided with a slot 17 for storing the support leg 10, and one end of the slot 17 is provided with a curved surface that contacts the support leg 10;

[0040] Two first connecting rods 9 are symmetrically rotatably connected in the storage box 1, and two connecting balls 21 are symmetrically rotatably connected at the bottom of the mounting frame 2. Second connecting rods 8 are rotatably connected between the two connecting balls 21 and the two first connecting rods 9 respectively.

[0041] Two sliders 15 are symmetrically slidably connected in the storage box 1. A slide groove slidably matched with the slider 15 is opened in the storage box 1. One side of the slider 15 is provided with an inclined surface that slides against the first connecting rod 9. A first spring 16 is connected between the other side of the slider 15 and the storage box 1.

[0042] As can be seen from the above, when the projector is retracted, the projection body 3 is located above the storage box 1 when in use, and the first electric push rod 11 is started to retract the telescopic end, so that the movable frame 12 moves upward, thereby driving the three sliding sleeves 14 to move upward, and then the three support legs 10 are unfolded outward, and the support legs 10 are in conflict with the curved surface at the end of the card slot 17, so that when the three support legs 10 are unfolded, the mounting frame 2 is driven to approach the inner bottom surface of the storage box 1, and the mounting frame 2 compresses the second connecting rod 8 downward through the connecting ball 21, so that the first connecting rod 9 rotates downward and shrinks in the slide groove at the bottom of the storage box 1, and at the same time, the first connecting rod 9 presses against the inclined surface of the slider 15 and pushes the slider 15 to slide in the slide groove to compress the first spring 16, until the mounting frame 2 drives the projection body 3 and the box cover 4 to be completely retracted in the storage box 1 (such as Figure 3 As shown in the figure, the closed space formed by the storage box 1, the box cover 4 and the mounting frame 3 separates the projector body from the outside air, preventing a large amount of dust from accumulating when the projector is idle, which affects the service life. At this time, the three supporting legs 10 are respectively stored in the three card slots 17, and the whole projection device is shrunk into a square body, which is convenient for transportation and carrying;

[0043] When the projector is unfolded, the first electric push rod 11 is started to push out the telescopic end, so that the movable frame 12 moves downward, thereby driving the three sliding sleeves 14 to move downward, and then the three supporting legs 10 are contracted. Based on the elastic force of the first spring 16, the slider 15 pushes the first connecting rod 9 to rotate, so that the second connecting rod 8 and the connecting ball 21 push the mounting frame 2 to separate from the storage box 1, so that one end of the card slot 17 at the bottom of the storage box 1 is always in contact with the supporting leg 10, so that the mounting frame 2 can drive the projection body 3 to extend smoothly out of the storage box 1, thereby completing the smooth unfolding of the projector and preventing damage to the projection body 3.

[0044] In addition, regarding the projection angle adjustment of the projection body 3, three support legs 10 are evenly arranged circumferentially at the bottom of the mounting frame 2, one of the support legs 10 extends to the rear of the projection direction, and a second electric push rod 13 is connected between the sliding sleeves 14 on the other two support legs 10 and the movable frame 12. Based on this, after the projector is unfolded, it is supported on a plane by three supporting legs 10. When adjusting the front and rear tilt angle of the projection body 3, the two second electric push rods 13 are simultaneously started to push out the telescopic ends, so that the corresponding sliding sleeves 14 move forward at the same time, so that the two sliding sleeves 14 slide and rise on the two supporting legs 10 located at the front side, so that the two supporting legs 10 are unfolded outward, so that the mounting frame 2 drives the projection body 3 to tilt forward; conversely, the two second electric push rods 13 are simultaneously started to retract the telescopic ends, so that the mounting frame 2 drives the projection body 3 to tilt backward; when adjusting the left and right tilt angles of the projection body 3, the two second electric push rods 13 are simultaneously started to push out the telescopic ends, when the left second electric push rod 13 pushes out the telescopic end, the mounting frame 2 drives the projection body 3 to tilt to the left; when the right second electric push rod 13 pushes out the telescopic end, the mounting frame 2 drives the projection body 3 to tilt to the right. In addition, the two connecting balls 21 at the bottom of the mounting frame 2 ensure that the connection between the first connecting rod 9 and the second connecting rod 8 in the storage box 1 will not prevent the mounting frame 2 from tilting forward and backward.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A projector for volunteer application training, Features: The invention comprises a storage box (1) with an opening facing upward and a mounting frame (2) which can be slidably extended into the storage box (1); a projection body (3) is supported on the mounting frame (2); a box cover (4) is fixedly connected to the top of the mounting frame (2); a clamping mechanism for fixing the projection body (3) is provided at the bottom of the box cover (4); the clamping mechanism comprises a gear (20) rotatably connected to the box cover (4) and two clamping plates (7) symmetrically slidably connected to the bottom of the box cover (4); racks (22) are fixedly connected to the two clamping plates (7); and the two racks (22) are respectively meshed with two sides of the gear (20).

2. A projector for volunteer application training according to claim 1, Features: The clamping surface of the clamping plate (7) is arranged to be an inclined surface facing the projection body (3).

3. A projector for volunteer application training according to claim 1, Features: A ratchet (19) coaxially fixed with the gear (20) is rotatably connected inside the box cover (4), a slide rod (5) slidably matched with the ratchet (19) is slidably connected inside the box cover (4), and a second spring (18) is connected between one end of the slide rod (5) and the box cover (4).

4. A projector for volunteer application training according to claim 3, Features: The slide bar (5) is an inverted T-shaped structure, one end of the slide bar (5) that cooperates with the ratchet (19) is fixedly connected to a trapezoidal block, and the top of the slide bar (5) slides out of the box cover (4).

5. A projector for volunteer application training according to claim 3, Features: The box cover (4) is rotatably connected to a rotating shaft (6), the gear (20) and the ratchet (19) are both fixedly sleeved on the outside of the rotating shaft (6), and the top of the rotating shaft (6) is fixedly connected to a hand wheel.

6. A projector for volunteer application training according to claim 1, Features: The bottom of the mounting frame (2) is rotatably connected to three supporting legs (10); a first electric push rod (11) is fixedly installed at the bottom of the mounting frame (2); a telescopic end of the first electric push rod (11) is fixedly connected to a moving frame (12); sliding sleeves (14) are slidably sleeved on the outer sides of the three supporting legs (10); and the three sliding sleeves (14) are rotatably connected to the moving frame (12).

7. A projector for volunteer application training according to claim 6, Features: The bottom of the storage box (1) is provided with a slot (17) for storing the support leg (10), and one end of the slot (17) is provided with a curved surface that contacts the support leg (10).

8. A projector for volunteer application training according to claim 7, Features: Two first connecting rods (9) are symmetrically rotatably connected inside the storage box (1), and two connecting balls (21) are symmetrically rotatably connected at the bottom of the mounting frame (2), and a second connecting rod (8) is rotatably connected between the two connecting balls (21) and the two first connecting rods (9), respectively.

9. A projector for volunteer application training according to claim 8, Features: Two sliders (15) are symmetrically slidably connected in the storage box (1), a slide groove slidably matched with the slider (15) is provided in the storage box (1), one side of the slider (15) is provided with an inclined surface slidably contacting with the first connecting rod (9), and the other side of the slider (15) is connected to the storage box (1) with a first spring (16).

10. A projector for volunteer application training according to claim 6, Features: The three support legs (10) are evenly arranged at the bottom of the mounting frame (2) in a circumferential direction, one of the support legs (10) extends to the rear in the projection direction, and a second electric push rod (13) is connected between the sliding sleeves (14) on the other two support legs (10) and the moving frame (12).

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