Canvas frame

Abstract

The utility model relates to the technical field of canvas frames, in particular to a canvas frame, which solves the problem that the tightness and the flattening property of canvas cannot be ensured when the canvas frame and the canvas are folded and flattened, and comprises a central shaft and a support frame, the number of the supporting frames is two, the ends, close to each other, of the two supporting frames are transversely and movably provided with transverse penetrating rods in a penetrating mode, first springs are fixed between the transverse penetrating rods and the supporting frames, the center shaft rotationally penetrates through the transverse penetrating rods, and the ends of the supporting frames move on the surface of the oval ejector block. When the two supporting frames are oppositely folded, the first spring can be compressed, that is, the two supporting frames can be close to the center shaft, so that the canvas can be folded, and the canvas is still in the tightened state during folding.

Description

TECHNICAL FIELD

[0001] The utility model relates to a canvas frame technical field, concretely relates to a canvas frame. BACKGROUND

[0002] Canvas is a kind of thick cotton fabric or hemp fabric, and it is named because it is initially used to make sailcloth, it usually adopts plain weave, and a small amount of twill weave is used, and multiple-thread yarn is used to weave warp and weft yarn, canvas is mainly divided into two categories: coarse canvas and fine canvas, coarse canvas has good waterproof performance, is solid and durable, and is commonly used for automobile transportation, open-air warehouse covering and field tent erection, fine canvas is used to make labor protection clothing and its supplies, and after dyeing or printing, it can also be used as shoe material, bag material, handbag, backpack, tablecloth, table cloth and the like;

[0003] Canvas frame is a frame used to support canvas, and canvas is covered on the canvas frame, that is, canvas material has high durability and weather resistance, and is suitable for use in outdoor environment.

[0004] However, the existing canvas frame has some defects, for example:

[0005] The canvas frame and the canvas can guarantee the tightness and flatness of the canvas when being flat, but the tightness and flatness of the canvas cannot be guaranteed when the canvas frame and the canvas are folded and flat.

[0006] Therefore, the utility model provides a canvas frame to solve the above problems. UTILITY MODEL CONTENT

[0007] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a canvas frame to solve the problem that the tightness and flatness of the canvas cannot be guaranteed when the canvas frame and the canvas are folded and flat.

[0008] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0009] A canvas frame, comprising a center shaft and a support frame.

[0010] The center shaft: the two ends of the center shaft are fixed with elliptical top blocks.

[0011] The support frame: the support frame has two ends, and the ends of the two support frames are transversely movably inserted with cross rods, the first springs are fixed between the cross rods and the support frame, the center shaft is rotatably inserted through the cross rod, the end of the support frame moves on the surface of the elliptical top block, and the two support frames are movably inserted with cross rods.

[0012] Through the technical scheme, the two support frames can support the canvas, and the first spring can push the support frames, so that the two support frames have a tendency to move away from each other, and the canvas is in a tight state, when the two support frames are folded relative to each other, the first spring can be compressed, that is, the two support frames can be close to the central shaft, so that the canvas can be folded and still in a tight state when being folded.

[0013] Preferably, the canvas fixing clamp comprises an end sliding rod, a clasp and a clamping buckle, the end sliding rod is transversely movably inserted into the end of the support frame, the middle part of the end sliding rod is provided with a protruding clamping buckle, the clamping buckle is hollow inside, and the upper side of the clamping buckle is screwed through the clasp.

[0014] Through the technical scheme, the end of the canvas can be inserted into the clamping buckle, and the clasp can clamp the end of the canvas by rotating, so that the stability of the canvas is ensured.

[0015] Preferably, the cross section of the end sliding rod is arc-shaped and curved towards the inside of the support frame.

[0016] Through the technical scheme, the clamping buckle and the clasp fix the middle part of the end of the canvas, and one clasp can fix the canvas.

[0017] Preferably, the end of the end sliding rod is transversely movably inserted into the inside of the end of the support frame, and a second spring is fixed between the end sliding rod and the inside of the end of the support frame.

[0018] Through the technical scheme, the second spring can make the end sliding rod have a tendency to move away from the central shaft, and the end sliding rod can push the canvas away from the central shaft, so that the end of the canvas is in a tight and flat state.

[0019] Preferably, the side surface of the support frame is linearly arranged with buckles.

[0020] Through the technical scheme, the buckles can be inserted into the edge holes of the canvas, and the side edges of the canvas are fixed.

[0021] Preferably, the inside of the support frame is provided with a sliding groove, the side surface of the transverse rod is integrally formed with a sliding block, and the sliding block slides in the sliding groove.

[0022] Through the technical scheme, the sliding block slides in the sliding groove to limit the movement track of the transverse rod, and the rotation of the transverse rod relative to the support frame is avoided.

[0023] The beneficial effects of the utility model are as follows:

[0024] In conclusion, the device sets two support frames to support the canvas, and the first spring can push the support frames, so that the two support frames have a tendency to move away from each other, and the canvas is in a tight state, when the two support frames are folded relative to each other, the first spring can be compressed, that is, the two support frames can be close to the central axis, so that the canvas can be folded, and the canvas is still in a tight state when folded, the second spring can make the canvas fixing clamp have a tendency to move away from the central axis, and then the canvas fixing clamp can push the canvas away from the central axis, so that the end of the canvas is in a tight and flat state. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective view of the utility model.

[0026] Figure 2 It is a top view of the utility model.

[0027] Figure 3 It is Figure 2 A-A cross-sectional structure schematic view.

[0028] Figure 4 It is a structure schematic view of the canvas in the prior art.

[0029] In the figure: 1, central axis; 2, oval top block; 3, cross rod; 4, first spring; 5, support frame; 6, buckle; 7, second spring; 8, end sliding rod; 9, plug buckle; 10, clamping buckle; 11, sliding block; 12, sliding groove. DETAILED DESCRIPTION

[0030] The embodiments of the utility model will be described in detail below. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model. Figures 1 to 4 The embodiments of the utility model will be described in detail below. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0031] As shown in the accompanying Figure 1 - the accompanying Figure 4 As shown in the accompanying

[0032] Central axis 1: both ends of the central axis 1 are fixed with oval top blocks 2;

[0033] Support frame 5: the cross section of support frame 5 is rectangular, the inside of support frame 5 is fixed with buckle 6 in a linear array from front to back, support frame 5 has two ends close to each other, and the two ends are transversely inserted with cross rod 3, and the inner side of support frame 5 is provided with sliding groove 12, the side of cross rod 3 is integrally formed with sliding block 11, sliding block 11 slides in sliding groove 12, first spring 4 is fixed between cross rod 3 and support frame 5, center shaft 1 rotates through cross rod 3, the end of support frame 5 moves on the surface of elliptical top block 2, and the ends of the two support frames 5 away from each other are provided with canvas fixing clamping pieces.

[0034] In the embodiment, the canvas fixing clamping piece comprises end sliding rod 8, plug buckle 9 and clamping buckle 10, the cross section of end sliding rod 8 is arc-shaped and curved towards the inside of support frame 5, the end of end sliding rod 8 is transversely inserted into the inner side of the end of support frame 5, second spring 7 is fixed between end sliding rod 8 and the inner side of the end of support frame 5, the middle part of end sliding rod 8 is provided with protruding clamping buckle 10, the inside of clamping buckle 10 is hollow, and plug buckle 9 is screwed through the upper side of clamping buckle 10.

[0035] The working principle of the device is as follows:

[0036] Referring to the accompanying drawings Figure 4 It can be seen that the four edges of the canvas are provided with holes, when installing, buckle 6 is inserted into the holes in the front and back edges of the canvas, plug buckle 9 is inserted into the holes in the left and right edges of the canvas, and then the canvas is fixed, when the two support frames 5 are bent, first spring 4 and second spring 7 are correspondingly stretched and compressed, so that the two support frames 5 are away from or close to center shaft 1, the two end sliding rods 8 are away from or close to center shaft 1, and then the canvas is always in a tight state and will not tear the canvas.

[0037] It should be noted that, in the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the term "mount", "link", "connect" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected; can be mechanical connection, also can be electrical connection; can be directly connected, also can pass through the indirect connection of intermediate medium, can be two elements inside the communication. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0039] Up to now, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments, and the person skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical scheme after these changes or replacements will fall within the protection scope of the utility model.

Claims

1. A canvas frame, characterized in that, It includes a central shaft (1) and a support frame (5); Central axis (1): Both ends of the central axis (1) are fixed with elliptical top blocks (2); Support frame (5): There are two support frames (5) with transverse rods (3) inserted laterally at their close ends. A first spring (4) is fixed between the transverse rod (3) and the support frame (5). The central shaft (1) rotates through the transverse rod (3). The end of the support frame (5) moves on the surface of the elliptical top block (2). Canvas fixing clips are installed at the ends of the two support frames (5) that are far apart from each other.

2. A canvas frame according to claim 1, characterized in that, The canvas fixing clamp includes an end sliding rod (8), a buckle (9) and a clip (10). The end sliding rod (8) is laterally inserted into the end of the support frame (5). A protruding clip (10) is provided in the middle of the end sliding rod (8). The clip (10) is hollow inside. The buckle (9) passes through the upper thread of the clip (10).

3. A canvas frame according to claim 2, characterized in that, The end sliding rod (8) has an arc-shaped cross section and bends toward the inside of the support frame (5).

4. A canvas frame according to claim 2, characterized in that, The end of the end sliding rod (8) is laterally inserted into the inner side of the end of the support frame (5), and a second spring (7) is fixed between the end sliding rod (8) and the inner side of the end of the support frame (5).

5. A canvas frame according to claim 1, characterized in that, The side of the support frame (5) is fixed with a linear array of buckles (6).

6. A canvas frame according to claim 1, characterized in that, The inner side of the support frame (5) is provided with a sliding groove (12), and the side of the transverse rod (3) is integrally formed with a slider (11), which slides in the sliding groove (12).

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