W-shaped filter frame

Abstract

The utility model belongs to the technical field of air filters, and particularly discloses a W-shaped filter frame which comprises a panel, a middle strip and edge strips, the middle strip and the edge strips are arranged in parallel, the two ends of the middle strip and the two ends of the edge strips are inserted into the panel, and the edge strips are located on the two sides of the middle strip respectively so that the frame can form a W-shaped structure after filter paper is inserted. The panel is provided with a half pin and a round hole, the inner side and the outer side of the middle strip are respectively provided with a half pin hole and a positioning boss which are matched with the half pin and the round hole, so that when the middle strip is clamped on the panel, the half pin is inserted into the half pin hole to limit the left-right movement of the middle strip and the panel, and the positioning boss is inserted into the round hole to limit the left-right movement of the middle strip and the panel. And the vertical movement of the middle strip and the panel is limited. Compared with the prior art, no matter the frame shakes up and down or left and right, the frame cannot loosen or shift, and when the frame is assembled, too large pressure is not needed, so that the assembling difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air filters, in particular to a W-shaped filter frame. Background Art

[0002] At present, the frames of filters available on the market mostly adopt a locking structure with round pin positioning. When subjected to vibration, the filter frame is easy to loosen, such as between the middle strip and the panel, which affects the product quality. In addition, because the round pin of the panel needs to be fully inserted into the round pin hole of the middle strip, a large pressure is required during installation (often using external pressure equipment) to insert the middle strip into the panel.

[0003] Therefore, how to design a new installation and locking structure to overcome the above problems and improve assembly efficiency has become a key research topic in the prior art. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a W-shaped filter frame to solve the above-mentioned problems.

[0005] To achieve the above object, the utility model discloses a W-shaped filter frame, comprising a panel, a middle strip and a side strip, wherein the middle strip and the side strip are arranged in parallel and both ends are inserted on the panel, and the side strips are separated on both sides of the middle strip, so that the frame after the filter paper is inserted forms a W-shaped structure;

[0006] The panel is provided with a half pin and a round hole, and the inner side and outer side of the middle strip are respectively provided with a half pin hole and a positioning boss matching the half pin and the round hole, so that when the middle strip is clamped on the panel, the half pin is inserted into the half pin hole to limit the left and right movement of the middle strip and the panel, and the positioning boss is inserted into the round hole to limit the up and down movement of the middle strip and the panel.

[0007] Compared with the prior art, the present application has the following effects: when the frame is assembled, the panel is opened to facilitate the positioning boss of the middle strip to enter the circular hole of the panel. When the panel is loosened, the panel will be reset, so that the positioning boss is clamped in the circular hole, thereby preventing the middle strip from moving up and down relative to the panel; at the same time, the half pin hole of the middle strip is directly mounted on the half pin of the panel, which not only realizes the positioning between the two, but also the half pin pushes the middle strip against the panel through the half pin hole, thereby preventing the middle strip from moving left and right relative to the panel. In summary, through the above structure, no matter whether the frame shakes up and down or left and right, it will not loosen or shift. At the same time, because the prior art is a cylindrical pin, and the present application is a combination of an internal half pin and a side circular hole, the present application does not require too much pressure during assembly, which reduces the difficulty of assembly.

[0008] Furthermore, the bottom surfaces of the middle strip and the edge strip are both flat planes.

[0009] Furthermore, the corners of the middle strip and the edge strip are obtuse angles, so that after the filter paper is placed on the middle strip and the edge strip, there is a gap between the bottom surface of the filter paper and the middle strip or the edge strip.

[0010] Furthermore, concave structures are provided at both ends of the middle strip.

[0011] Furthermore, the edge strip includes a cardboard slot for installing the filter paper and a reinforcing rib, and the reinforcing rib is used to improve the strength of the frame.

[0012] Furthermore, positioning pins are provided on the panel, and positioning holes matching the positioning pins are provided on the edge strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of a W-shaped filter frame according to an embodiment of the present invention;

[0015] Figure 2 It is a schematic bottom surface structure diagram of the middle strip according to an embodiment of the present invention;

[0016] Figure 3 It is a schematic diagram of the inner side of the assembled structure of the middle strip and the panel according to an embodiment of the present invention;

[0017] Figure 4 It is a schematic diagram of the outer side of the assembled structure of the middle strip and the panel according to an embodiment of the present invention;

[0018] Figure 5 It is a schematic diagram of the concave structure of the middle strip according to an embodiment of the present invention.

[0019] The reference numerals are as follows:

[0020] 1. Panel; 2. Middle strip; 3. Edge strip; 4. Filter paper; 5. Half pin; 6. Round hole; 7. Half pin hole; 8. Positioning boss; 9. Bottom surface; 10. Corner; 11. Concave structure; 12. Gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] 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.

[0022] like Figures 1-5 As shown, the utility model discloses a W-shaped filter frame, comprising a panel 1, a middle strip 2 and a side strip 3, wherein the middle strip 2 and the side strip 3 are arranged in parallel and both ends are inserted on the panel 1, and the side strip 3 is located on both sides of the middle strip 2, so that the frame after the filter paper 4 is inserted forms a W-shaped structure;

[0023] A half pin 5 and a round hole 6 are provided on the panel 1, and a half pin hole 7 and a positioning boss 8 matching the half pin 5 and the round hole 6 are respectively provided on the inner and outer sides of the middle strip 2, so that when the middle strip 2 is clamped on the panel 1, the half pin 5 is inserted into the half pin hole 7 to limit the left and right movement of the middle strip 2 and the panel 1, and the positioning boss 8 is inserted into the round hole 6 to limit the up and down movement of the middle strip 2 and the panel 1, thereby ensuring that the middle strip 2 is firmly and accurately connected to the panel 1.

[0024] Compared with the prior art, the present application has the following effects: when the frame is assembled, the panel 1 is opened (the panel 1 is usually made of plastic and has a certain elasticity) to facilitate the positioning boss 8 of the middle strip 2 to enter the circular hole 6 of the panel 1. When the panel 1 is loosened, the panel 1 will be reset, so that the positioning boss 8 is clamped in the circular hole 6, thereby preventing the middle strip 2 from moving up and down relative to the panel 1; at the same time, the half pin hole 7 of the middle strip 2 is directly mounted on the half pin 5 of the panel 1, which not only realizes the positioning between the two, but also the half pin 5 pushes the middle strip 2 against the panel 1 through the half pin hole 7, thereby preventing the middle strip 2 from moving left and right relative to the panel 1. In summary, through the above structure, no matter whether the frame shakes up and down or left and right, it will not loosen or shift. At the same time, because the prior art is a cylindrical pin, and the present application is a combination of an internal half pin 5 and a side circular hole 6, the present application does not require too much pressure during assembly, which reduces the difficulty of assembly.

[0025] Following the above embodiment, more specifically, Figure 2 As shown, the bottom surfaces 9 of the middle strip 2 and the side strip 3 are both flat. Compared with the prior art in which the bottom surface 9 is an inclined structure, after the filter paper 4 is installed, the gap 12 between the filter paper 4 and the bottom surface 9 is larger, so that after the glue is applied, the glue has better fluidity, allowing more glue to flow into the gap 12, so that the filter paper 4 can be better adhered and fixed on the bottom surface 9.

[0026] Continuing with the above embodiments, more specifically, the corners 10 of the middle strip 2 and the edge strip 3 are obtuse angles, so that after the filter paper 4 is placed on the middle strip 2 and the edge strip 3, there is a gap 12 between the bottom surface of the filter paper 4 and the middle strip 2 or the edge strip 3. Among them, the larger the gap 12 is, the more glue can enter the gap 12, further improving the fixing effect of the filter paper 4 and making the filter paper 4 stick tighter.

[0027] Continuing with the above embodiments, more specifically, as Figure 5 shown, both ends of the middle strip 2 are provided with concave structures 11. Among them, when the glue flows through the end concave structure 11, the glue can only flow outwards after first entering the cavity of the concave structure 11. Therefore, through the design of the concave structure 11, the flow path of the glue becomes longer, and the glue has solidified before overflowing from the end of the middle strip 2, so the glue cannot flow to the outside of the frame, thus ensuring the external beauty of the frame. It should be noted that the middle strip 2 of the present application is actually a double-layer structure with a concave cavity in the middle, while the middle strip 2 of the prior art is a single-layer structure. Therefore, the flow path of the glue in the middle strip 2 of the prior art is short during use, and the problem of glue flowing to the outside of the frame often occurs.

[0028] Continuing with the above embodiments, more specifically, the edge strip 3 includes a card slot for installing the filter paper 4 and a reinforcing rib, and the reinforcing rib is used to improve the strength of the frame. In one embodiment, as Figure 1 shown, there are two panels 1, seven middle strips 2, and two edge strips 3. The panels 1 are located at both ends of the middle strip 2. Four middle strips 2 are at the upper end of the panel 1, and three middle strips 2 and two edge strips 3 are at the lower end of the panel 1. Among them, each middle strip 2 has two card slots, and each edge strip 3 has one card slot and one reinforcing rib. In other words, there are eight card slots at the upper end of the panel 1 and eight card slots at the lower end of the panel 1, and the upper and lower card slots are not aligned up and down, so as to ensure that the filter paper loaded in the card slots forms a W shape. At the same time, the two reinforcing ribs are located on the outermost side of the panel 1, thereby improving the strength of the frame.

[0029] Continuing with the above embodiments, more specifically, positioning pins are provided on the panel 1, and positioning holes matching the positioning pins are provided on the edge strip 3. Among them, through the design of the positioning pins and the positioning holes, the edge strip 3 and the panel 1 are clamped.

[0030] Therefore, the present patent uses a novel W-shaped frame, and its unique structure can ensure rapid assembly, good stability after assembly, and not easy to loosen.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A W-shaped filter frame, characterized in that: It comprises a panel, a middle strip and side strips, wherein the middle strip and the side strips are arranged in parallel and both ends are inserted on the panel, and the side strips are located on both sides of the middle strip, so that the frame after the filter paper is inserted forms a W-shaped structure; The panel is provided with a half pin and a round hole, and the inner side and outer side of the middle strip are respectively provided with a half pin hole and a positioning boss matching the half pin and the round hole, so that when the middle strip is clamped on the panel, the half pin is inserted into the half pin hole to limit the left and right movement of the middle strip and the panel, and the positioning boss is inserted into the round hole to limit the up and down movement of the middle strip and the panel.

2. A W-shaped filter frame according to claim 1, characterized in that: The bottom surfaces of the middle strip and the side strip are both planes.

3. A W-shaped filter frame according to claim 2, characterized in that: The edge angles of the middle strip and the side strip are obtuse angles, so that after the filter paper is placed on the middle strip and the side strip, there is a gap between the bottom surface of the filter paper and the middle strip or the side strip.

4. A W-shaped filter frame according to any one of claims 1-3, characterized in that: Both ends of the middle strip are provided with concave structures.

5. A W-shaped filter frame according to claim 1, characterized in that: The edge strip comprises a paper slot for installing filter paper and a reinforcing rib, and the reinforcing rib is used to improve the strength of the frame.

6. A W-shaped filter frame according to claim 1, characterized in that: The panel is provided with a positioning pin, and the side strip is provided with a positioning hole matching the positioning pin.

Images