CN215703530U - Positioning and placing jig for diaphragm products - Google Patents

Abstract

The utility model relates to the technical field of injection molding insert positioning, in particular to a positioning and placing jig for diaphragm products. Compared with the prior art, the product bearing and positioning frame and the product feeding frame which are oppositely arranged form a combination capable of moving relatively, the positioning surface and the positioning column on the product bearing and positioning frame are used for realizing positioning matching with a product placing target to realize accurate positioning, the product bearing area matched with the product in projection shape along the X direction is arranged for fixing the product, the ejector block arranged on the product feeding frame and the relative movement of the product feeding frame and the product bearing and positioning frame enable the ejector block to move in the ejection through hole oppositely arranged in the X direction, the product in the product bearing area is accurately pushed to the target position, the operation is simple and rapid, the product is not easily scratched, and the production efficiency and the production yield are improved.

Description

Positioning and placing jig for diaphragm products

Technical Field

The utility model relates to the technical field of injection molding insert positioning, in particular to a positioning and placing jig for diaphragm products.

Background

In recent years, with economic development In China, the existing face shells of various communication electronic and household appliances In the market are mostly produced by adopting In Molding Label (IML) face shells through In Molding Label (IML) In an In-mold insert Molding mode, printing a thin film, Molding the thin film through a Molding machine, cold cutting the thin film through a cutting die, and finally implanting the thin film into an injection mold by utilizing a manual or mechanical arm for injection Molding.

When empty sheets of IML products are injected, the empty sheets are placed by manually arranging the products on a mould in an injection molding machine, but the empty sheets have several problems during placement: 1) the membrane cavity can not be clearly seen when the membrane is placed, and the empty sheet is easy to deflect; 2) the empty piece is not placed in the right position and not in place, so that the product is easily crushed during injection molding; 3) the production efficiency is low by taking the blind plugs of the products one by one into an injection molding machine; 4) the product is poor due to the deviation and the crush injury. In contrast, for example, a patent with publication number CN206264271U (publication date of 2017, 6/20) in the prior art discloses a substrate positioning structure of an IML injection mold, which improves positioning accuracy and production efficiency by providing a positioning pin structure.

However, the problems of low efficiency and poor precision of feeding and positioning of film products in the prior art need to be solved.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a membrane product positioning and placing jig, which comprises

The product bearing and positioning frame is provided with at least two product bearing areas, at least two ejection through holes and at least two positioning columns, wherein the projection shape of the product bearing areas along the X direction is matched with the product shape, the projection of the ejection through holes in the X direction is positioned in the projection area of the product bearing areas in the X direction, and the positioning columns are used for being matched with a positioning structure at a product placement target to enable the positions of the product bearing areas to be matched with the product placement target;

the product feeding frame is opposite to the product bearing and positioning frame and provided with at least two ejector blocks, the projection of the ejector blocks in the X direction is covered on the projection of the ejection through holes in the X direction, and the ejector blocks are driven to move in the ejection through holes along the X direction by the product feeding frame.

In an embodiment, the product bearing area is a recessed area on the positioning surface along the X direction, and a recessed bottom surface defining the recessed area is a bearing surface.

In one embodiment, the ejector block is detachably connected with the product feeding frame, a mounting groove corresponding to the ejector block is formed in the product feeding frame, the shape of the mounting groove is matched with that of the ejector block, one side of the ejector block is arranged in the mounting groove and matched with the mounting groove, and one side of the ejector block, which deviates from the mounting groove, is defined as an ejection surface.

In one embodiment, the device further comprises at least two guide structures, the product bearing and positioning frame and the product feeding frame are connected through the guide structures, and the guide structures comprise

The guide sleeve is provided with a guide pipe and a connecting flange, the product feeding frame is provided with a mounting hole matched with the guide pipe in shape, the guide pipe is inserted into the mounting hole, and the guide sleeve is detachably connected with the product feeding frame through the connecting flange; and

the guide post is detachably and fixedly connected with the product bearing positioning frame and penetrates through the guide pipe.

In an embodiment, the guide tube protrudes from the product feeding frame relatively, and when the guide tube abuts against the product bearing positioning frame, the ejecting surface is located on one side of the positioning surface, which is relatively far away from the bearing surface, in the X direction.

In one embodiment, the device further comprises at least one limiting structure, and the product bearing and positioning frame and the product feeding frame are connected through the limiting structure; the limiting structure comprises

A through hole is formed in the product feeding frame, and one end of the connecting part penetrates through the through hole to be detachably and fixedly connected with the product bearing positioning frame;

the limiting part is arranged at the other end of the connecting part, and the radial size of the limiting part is relatively larger than that of the connecting part.

In an embodiment, when the limiting portion abuts against the product feeding frame, the ejecting surface is located on one side of the bearing surface, which is relatively far away from the positioning surface.

In one embodiment, a first handle is arranged on one side of the product feeding frame, which is far away from the product bearing and positioning frame, and the first handle is arranged in the middle of the product feeding frame.

In one embodiment, the product feeder rack has a first opening in a middle portion thereof, the first opening being located between the first handle and two connection points of the product feeder rack;

and a second handle is arranged on one side of the product bearing and positioning frame, which is close to the product feeding frame, and the second handle penetrates through the first opening.

In an embodiment, the product bearing device further comprises at least two base plates, the base plates are embedded in the product bearing area and do not exceed the positioning surface, and second openings matched with the ejection through holes in shape are arranged in the positions, corresponding to the ejection through holes, of the base plates.

Based on the above, compared with the prior art, the film product positioning and placing jig provided by the utility model has the advantages that the relatively movable combination is formed by the product bearing and positioning frame and the product feeding frame which are oppositely arranged, the positioning surface and the positioning column on the product bearing and positioning frame are used for realizing the positioning and matching with the product placing target position so as to realize the accurate positioning, the product bearing area matched with the product in the projection shape along the X direction is arranged for fixing the product, the top block arranged on the product feeding frame and the relative movement of the product feeding frame and the product bearing and positioning frame enable the top block to move in the ejection through hole oppositely arranged in the X direction, the product in the product bearing area is accurately pushed to the target position, the operation is simple and rapid, the product is not easily scratched, and the production efficiency and the production yield are improved.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts; in the following description, the drawings are illustrated in a schematic view, and the drawings are not intended to limit the present invention.

Fig. 1 is a schematic front view of a positioning and placing jig for film products according to the present invention;

FIG. 2 is a cross-sectional view A2 of FIG. 1;

FIG. 3 is a schematic front view of a product positioning frame according to an embodiment;

FIG. 4 is a schematic front view of a product feeding stand according to an embodiment;

FIG. 5 is a schematic top and right view of an embodiment;

FIG. 6 is a cross-sectional view A1 of FIG. 1;

FIG. 7 is a schematic view of a guide structure according to an embodiment;

FIG. 8 is a cross-sectional view A3 of FIG. 1;

FIG. 9 is a schematic front view of an example shim plate.

Reference numerals:

100 product bearing positioning frame 101 positioning surface 110 product bearing area

111 bearing surface 120 ejecting through hole 130 positioning column

140 second handle 150 and second opening in backing plate 151

200 product feeding rack 210 top block 211 ejecting surface

220 mounting hole 230 mounting groove 240 first handle

250 first opening 300 guide structure 310 guide sleeve

311 guide pipe 312 connecting flange 320 guide post

400 limiting structure 410 connecting part 420 limiting part

260 through hole

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; the technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be noted that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and are not to be construed as limiting the present invention; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The following description will be made by way of specific examples.

The utility model provides a film product positioning and placing jig, as shown in fig. 1 and fig. 2, comprising a product bearing and positioning frame 100 and a product feeding frame 200, wherein one surface of the product bearing and positioning frame 100 is defined as a positioning surface 101, the normal direction of the positioning surface 101 is defined as the X direction, the product bearing and positioning frame 100 is provided with at least two product bearing areas 110, at least two ejection through holes 120 and at least two positioning columns 130, the projection shape of the product bearing areas 110 along the X direction is matched with the product shape, the projection of the ejection through holes 120 along the X direction is positioned in the projection area of the product bearing areas 110 along the X direction, and the positioning columns 130 are used for being matched with a positioning structure at a product placing target position so as to enable the position of the product bearing areas 110 to be matched with the product placing target position; the product feeding frame 200 is arranged opposite to the product bearing and positioning frame 100, the product feeding frame 200 is provided with at least two top blocks 210, the projection of the top blocks 210 in the X direction is covered on the projection of the ejection through holes 120 in the X direction, and the top blocks 210 are driven to move in the ejection through holes 120 along the X direction by the product feeding frame 200.

In specific implementation, as shown in fig. 1 and 3, four product bearing areas 110 and corresponding ejection through holes 120 are disposed on the product bearing and positioning frame 100, four ejection blocks 210 are disposed on the product feeding frame 200, and the product bearing and positioning frame 100 and the product feeding frame 200 are both plate-shaped, and light materials such as wood plates and plastic plates are adopted in consideration of the use mode of the jig and the strength requirement, and the profile shapes of the product bearing and positioning frame 100 and the product feeding frame 200 may be identical or slightly different, wherein the product bearing and positioning frame 100 needs to form a positioning fit with the product placement position, so the profile shape of the positioning surface 101, that is, the profile shape of the product bearing and positioning frame 100, should be completely the same as the mold cavity of the injection mold to ensure accurate positioning of the jig relative to the mold, and the profile shape of the positioning surface 101 in this embodiment is as shown in fig. 1 or 3. As shown in fig. 1, four positioning columns 130 are disposed on the positioning surface 101, the positioning columns 130 are used for matching with a positioning structure reserved on an injection mold, and when the positioning surface 101 and the positioning columns 130 are matched with a product placement destination, that is, the injection mold, the position of the product bearing area 110 should be matched with the product placement destination, that is, the product bearing area 110 overlaps with the product placement destination in the X direction. The product feeding frame 200 and the product bearing and positioning frame 100 are arranged in parallel and oppositely and are arranged on one side which is relatively far away from the positioning surface 101, and the product feeding frame 200 can move along the X direction so as to drive the top block 210 to move in the ejection through hole 120.

The film product positioning and placing jig provided by the utility model forms a relatively movable combination through the product bearing and positioning frame and the product feeding frame which are oppositely arranged, realizes positioning matching with a product placing target position through the positioning surface and the positioning column on the product bearing and positioning frame to realize accurate positioning, fixes products through the product bearing area with the projection shape along the X direction matched with the products, enables the top block to move in the ejection through hole which is oppositely arranged in the X direction through the top block arranged on the product feeding frame and the relative movement of the product feeding frame and the product bearing and positioning frame, accurately pushes the products in the product bearing area to the target position, is simple and rapid to operate, is not easy to scratch the products, and improves the production efficiency and the production yield.

Preferably, as shown in fig. 2 and 3, the product bearing area 110 is a recessed area on the positioning plane 101 along the X direction, and the recessed bottom surface defining the recessed area is the bearing surface 111, and it should be understood that the recessed bottom surface refers to a surface seen by looking at the product bearing positioning frame 100 along the X direction.

Preferably, in an embodiment, as shown in fig. 2, 4 and 5, the top block 210 is detachably connected to the product feeding frame 200, a threaded hole or a via hole is respectively formed in corresponding positions of the top block 210 and the product feeding frame 200 to connect and fix the two through a threaded connector, the product feeding frame 200 is provided with a mounting groove 230 corresponding to the top block 210, the shape of the mounting groove 230 is matched with that of the top block 210, one side of the top block 210 is arranged in the mounting groove 230 and is matched with the mounting groove 230, a side of the top block 210 away from the mounting groove 230 is defined as an ejection surface 211, and when in use, the film product is ejected out of the product bearing area 110 to a target position through the ejection surface 211; preferably, as shown in fig. 5, the ejection surface 211 has a curved surface structure, and the middle portion of the ejection surface slightly protrudes from the edge portion of the ejection surface, so as to ensure the contact area of the film pushing product and avoid scratching the product; preferably, the material of the top block 210 is POM plastic, for example.

Preferably, in an embodiment, as shown in fig. 1 and 6, the product positioning device further includes at least two guiding structures 300, and the product feeding rack 100 and the product feeding rack 200 are connected through the guiding structures 300 so that the product feeding rack 200 and the product positioning rack 100 can stably move relatively in the X direction, thereby improving the product positioning accuracy.

Specifically, as shown in fig. 6, the guiding structure 300 includes a guiding sleeve 310 and a guiding column 320, as shown in fig. 7, wherein the guiding sleeve 310 has a guiding pipe 311 and a connecting flange 312, as shown in fig. 3, a mounting hole 220 is provided on the product feeding frame 200, the shape and size of which are matched with those of the guiding pipe 311, the guiding pipe 311 is inserted into the mounting hole 220, the guiding sleeve 310 is detachably connected with the product feeding frame 200 through the connecting flange 312, for example, the guiding sleeve is connected and fixed with the product feeding frame 200 through the connecting flange 312 by screws;

the guide post 320 is inserted into the connecting hole and then the guide post 320 is pressed against the plane structure to fix the guide post 320, as shown in fig. 3, a connecting hole with an axis direction perpendicular to the positioning surface and a fastening hole with an axis direction perpendicular to the connecting hole are arranged on the product bearing positioning frame 100.

Preferably, as shown in fig. 7, when the guiding tube 311 is inserted into the mounting hole 220 and the connecting flange 312 contacts with one side of the product feeding frame 200, the guiding tube 311 protrudes from the other side of the product feeding frame 200, and when the guiding tube 311 abuts against the product bearing positioning frame 100, the ejecting surface 211 is located on one side of the positioning surface 101, which is far away from the carrying surface 111 in the X direction, in this case, the film product is ejected, and the size of the jig can be adjusted according to the pushing distance, so that the ejecting surface 211 reaches the film placement destination.

Preferably, in an embodiment, as shown in fig. 1, the product feeding rack further includes at least one limiting structure 400, in this embodiment, four limiting structures 400 are provided to further enhance the limitation on the moving direction of the product feeding rack 200, and the product bearing positioning rack 100 and the product feeding rack 200 are connected by the limiting structures 400 to limit the relative moving distance therebetween, so as to prevent the product feeding rack 200 from separating from the product bearing positioning rack 100 due to being separated from the guiding column 320.

Specifically, as shown in fig. 1, the limiting structure 400 includes a connecting portion 410 and a limiting portion 420, a via hole 260 is provided on the product feeding frame 200, and an end portion of the connecting portion 410 passes through the via hole 260 and is detachably and fixedly connected to the product bearing and positioning frame 100; the connecting portion 410 is, for example, a long screw, and a threaded hole is formed in the product bearing and positioning frame 100 by fixing a threaded sleeve, and the threaded sleeve and the screw are fixedly connected. The radial dimension of the limiting part 420 is relatively larger than that of the connecting part 410 to form effective limiting stop, the limiting part 420 is arranged at the other end part of the connecting part 410, the limiting part 420 adopts an annular gasket, an equal-height sleeve is sleeved on the screw, through arranging a first counter bore on the product bearing and positioning frame 100, one end of the equal-height sleeve is abutted in the first counter bore, and the other end of the equal-height sleeve is abutted to the limiting part 420, namely, the annular gasket is clamped between the equal-height sleeve and the screw cap for fixing; preferably, a second counter bore is arranged at the through hole 260 of the product feeding frame 200, the first counter bore and the second counter bore have the same aperture and are both larger than the outer diameter of the equal-height sleeve, and a coil spring is compressed and arranged in the counter bore, so that the product feeding frame 200 can automatically rebound after the product is ejected.

Preferably, when the limiting portion 420 abuts against the product feeding frame 200, the ejecting surface 211 is located on a side of the carrying surface 111 relatively far from the positioning surface 101, which is an initial state where the ejecting block is not ejected, and a product can be placed in the product carrying area 110 for waiting operation.

Preferably, in one embodiment, as shown in fig. 8, a first handle 240 is provided on a side of the product feeding rack 200 facing away from the product carrying positioning rack 100, and the first handle 240 is provided in the middle of the product feeding rack 200.

Preferably, in one embodiment, as shown in fig. 4, the product feeding rack 200 has a first opening 250 in the middle, the first opening 250 is located between two connection points of the first handle 240 and the product feeding rack 200, the first handle 240 and the product feeding rack 200 are detachably connected through a screw thread, two holes are respectively formed at the two connection points, and the first opening 250 is located between the two holes; as shown in fig. 8, the product carrier spacer 100 has a second handle 140 on a side thereof adjacent to the product feeding rack 200, and the second handle 140 passes through the first opening 250.

Preferably, in an embodiment, the package structure further includes at least two backing plates 150, as shown in fig. 9, four backing plates 150 are disposed corresponding to the product bearing area 110, the backing plates 150 are embedded in the product bearing area 110 and the backing plates 150 do not exceed the positioning surface 101, in practice, the thickness of the backing plates 150 can be set according to specific situations to adapt to the thickness of the product or the size of the top block, and a second opening 151 matched with the shape of the ejection through hole 120 is disposed at a position of the backing plate 150 corresponding to the ejection through hole 120 for the top block 210 to pass through.

In summary, compared with the prior art, the film product positioning and placing jig provided by the utility model has the advantages that the relatively movable combination is formed by the product bearing and positioning frame and the product feeding frame which are oppositely arranged, the positioning surface and the positioning column on the product bearing and positioning frame are used for realizing the positioning and matching with the product placing target position so as to realize the accurate positioning, the product bearing area matched with the product in the projection shape along the X direction is arranged for fixing the product, the top block is enabled to move in the ejection through hole oppositely arranged in the X direction through the relative movement of the top block arranged on the product feeding frame, the product feeding frame and the product bearing and positioning frame, the product in the product bearing area is accurately pushed to the target position, the operation is simple and rapid, the product is not easily scratched, and the production efficiency and the production yield are improved.

In addition, it will be appreciated by those skilled in the art that, although there may be many problems with the prior art, each embodiment or aspect of the present invention may be improved only in one or several respects, without necessarily simultaneously solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.

Although terms such as product bearing locator, locating surface, product bearing area, bearing surface, ejection through hole, locating post, second handle, backing plate, second opening, product feeder, top block, ejection surface, mounting hole, via hole, first handle, first opening, guide structure, guide sleeve, guide tube, connecting flange, guide post, limiting structure, connecting portion, and limiting portion are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention; the terms "first," "second," and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a tool is laid in diaphragm class product location which characterized in that: comprises that

The product bearing and positioning frame (100) is characterized in that one surface of the product bearing and positioning frame (100) is defined as a positioning surface (101), the normal direction of the positioning surface (101) is defined as an X direction, the product bearing and positioning frame (100) is provided with at least two product bearing areas (110), at least two ejection through holes (120) and at least two positioning columns (130), the projection shape of the product bearing areas (110) along the X direction is matched with the product shape, the projection of the ejection through holes (120) in the X direction is positioned in the projection area of the product bearing areas (110) in the X direction, and the positioning columns (130) are used for being matched with a positioning structure at a product placement destination to enable the positions of the product bearing areas (110) to be matched with the product placement destination;

the product feeding frame (200) is arranged opposite to the product bearing and positioning frame (100), the product feeding frame (200) is provided with at least two ejector blocks (210), the projection of the ejector blocks (210) in the X direction is covered on the projection of the ejection through holes (120) in the X direction, and the ejector blocks (210) are driven to move in the ejection through holes (120) along the X direction by the product feeding frame (200).

2. The film product positioning and placing jig of claim 1, wherein: the product bearing area (110) is a concave area on the positioning surface (101) along the X direction, and a concave bottom surface defining the concave area is a bearing surface (111).

3. The film product positioning and placing jig of claim 2, wherein: the top block (210) is detachably connected with the product feeding frame (200), a mounting groove (230) corresponding to the top block (210) is formed in the product feeding frame (200), the shape of the mounting groove (230) is matched with that of the top block (210), one side of the top block (210) is arranged in the mounting groove (230) and is matched with the mounting groove (230), and a side, deviating from the mounting groove (230), of the top block (210) is defined as a top-out surface (211).

4. The film product positioning and placing jig of claim 3, wherein: the product feeding device is characterized by further comprising at least two guide structures (300), wherein the product bearing positioning frame (100) is connected with the product feeding frame (200) through the guide structures (300), and each guide structure (300) comprises

The guide sleeve (310) is provided with a guide pipe (311) and a connecting flange (312), a mounting hole (220) with a shape matched with that of the guide pipe (311) is formed in the product feeding frame (200), the guide pipe (311) is inserted into the mounting hole (220), and the guide sleeve (310) is detachably connected with the product feeding frame (200) through the connecting flange (312); and

the guide post (320), the guide post (320) and the product bearing and positioning frame (100) are detachably and fixedly connected, and the guide post (320) penetrates through the guide pipe (311).

5. The film product positioning and placing jig of claim 4, wherein: the guide pipe (311) protrudes out of the product feeding frame (200) relatively, and when the guide pipe (311) abuts against the product bearing positioning frame (100), the ejection surface (211) is located on one side, away from the bearing surface (111) relatively, of the positioning surface (101) in the X direction.

6. The film product positioning and placing jig of claim 5, wherein: the product feeding device also comprises at least one limiting structure (400), and the product bearing and positioning frame (100) is connected with the product feeding frame (200) through the limiting structure (400); the limit structure (400) comprises

The product feeding frame (200) is provided with a through hole (260), and one end part of the connecting part (410) penetrates through the through hole (260) to be detachably and fixedly connected with the product bearing positioning frame (100);

the radial dimension of the limiting part (420) is relatively larger than that of the connecting part (410), and the limiting part (420) is arranged at the other end part of the connecting part (410).

7. The film product positioning and placing jig of claim 6, wherein: when the limiting part (420) abuts against the product feeding frame (200), the ejection surface (211) is located on one side, relatively far away from the positioning surface (101), of the bearing surface (111).

8. The film product positioning and placing jig of claim 7, wherein: one side of the product feeding frame (200) departing from the product bearing positioning frame (100) is provided with a first handle (240), and the first handle (240) is arranged in the middle of the product feeding frame (200).

9. The film product positioning and placing jig of claim 8, wherein: the product feeding rack (200) is provided with a first opening (250) in the middle, and the first opening (250) is positioned between the first handle (240) and two connection points of the product feeding rack (200);

a second handle (140) is arranged on one side of the product bearing and positioning frame (100) close to the product feeding frame (200), and the second handle (140) penetrates through the first opening (250).

10. The film product positioning and placing jig of any one of claims 1 to 9, wherein: the product bearing area (110) is embedded in the base plate (150), the base plate (150) does not exceed the positioning surface (101), and a second opening (151) matched with the ejection through hole (120) in shape is arranged at the position, corresponding to the ejection through hole (120), of the base plate (150).

Images