CN219499701U - Assembly structure capable of avoiding glue overflow - Google Patents

Abstract

The utility model relates to the field of buckle structures, in particular to a fitting structure for avoiding glue overflow outwards, wherein a glue overflow notch is formed in each positioning groove near the side wall of an inner cavity of a second product shell, a positioning column is inserted into the positioning groove, the distance from the bottom end of the glue overflow notch to the positioning column is defined as H, the height of the positioning column is defined as C, and the two have the following dimensional relationship: h=c/3; and the distance between the bottom of the positioning groove and the tail end of the positioning column is defined as B, wherein the two have the following dimensional relationship: b is less than or equal to C/3. After a gap is formed, the glue quantity can be controlled to be 0.4-0.6g, unified glue spraying of different positioning grooves is realized, even if the glue is sprayed, the glue can flow out from the glue overflow gap and only flows into the product without influencing the outer side of the product, the performance of the product is not influenced, and meanwhile, the glue spraying difficulty is lowered by reducing the change of the glue quantity.

Description

Assembly structure capable of avoiding glue overflow

Technical Field

The utility model relates to the field of buckle structures, in particular to a fitting structure for avoiding glue overflow.

Background

In normal structural designs, the most common is the design of the button. The disadvantage is that the design of the snap-fit in a more complex form of product is subject to a number of limitations. Meanwhile, the product is difficult to manufacture and develop in the later-stage mould, and the development cost is high.

In order to reduce development difficulty and development cost, a simple lower shell positioning column/groove glue matched structure is adopted in the prior art. But the detents of the product design are each different, as is the shape of the product. Thus, the glue amount of each groove is difficult to control in the glue spraying process. Often, more glue is sprayed to overflow the product, and the reliability test of the glue structure is less qualified.

We have verified a number of experiments. It is found that a gap is formed in the middle of the positioning groove to greatly relax the required glue amount of the positioning groove.

Disclosure of Invention

In order to solve the problems, the utility model provides a fitting structure for avoiding glue overflow, wherein after a gap is formed, the glue quantity can be controlled to be at a uniform value, uniform glue spraying of different positioning grooves can be realized, and even if the glue is sprayed, the glue can flow out from the glue overflow gap and only flows into the product without influencing the outer side of the product, and the performance of the product is not influenced.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a avoid assembling structure of glue that overflows outwards, includes a plurality of reference column that is located first product shell bottom and a plurality of constant head tank that is located second product shell inner wall, and every constant head tank is close to the lateral wall of the inside cavity of second product shell and has seted up a glue overflow breach, wherein the reference column is pegged graft in the constant head tank, and the distance definition of glue overflow breach bottom to the reference column is H, wherein the high definition of reference column is C, and wherein there is following size relation between them: h=c/3; and the distance between the bottom of the positioning groove and the tail end of the positioning column is defined as B, wherein the two have the following dimensional relationship: b is less than or equal to C/3.

Further, wherein the constant head tank is provided with the inner wall of glue overflow breach and is the breach lateral wall, and the inner wall that the breach lateral wall was kept away from to the constant head tank is the product inner wall, and wherein there is first clearance between reference column and the breach lateral wall, and the distance of this first clearance is defined as F, has the second clearance between reference column and the product inner wall, and the distance of this second clearance is defined as G, and wherein both sizes accord with: f is more than or equal to 3*G.

Further, the second product housing wall thickness is defined as J, wherein the following dimensional relationship exists between the height C of the locator post and the second product housing wall thickness J: c is less than or equal to 2*J.

Further, the width of the positioning post is defined as D, and the following dimensional relationship exists between the width D of the positioning post and the second product housing wall thickness J: d is less than or equal to 3*J.

Further, the end intermediate position of reference column has still offered the width and has been reduced the gluey breach for E, and the end of reference column still is provided with the location that is located the gluey breach both sides and ends the bone, and the width that should fix a position the bone is K, wherein reduces the width E of gluey breach and the width K that fixes a position and end the bone between the following dimensional relationship: e is less than or equal to K.

The utility model has the beneficial effects that: before the glue overflow notch is arranged, for example, the glue amount required by the groove A is 0.1g, and the glue amount required by the groove B is 0.4g, so that the glue spraying variation is large, the glue spraying can be accurately performed only by continuously adjusting glue spraying equipment, the glue spraying difficulty is high, and the debugging is troublesome; after a gap is formed, the glue quantity can be controlled to be 0.4-0.6g, unified glue spraying of different positioning grooves is realized, even if the glue is sprayed, the glue can flow out from the glue overflow gap and only flows into the product without influencing the outer side of the product, the performance of the product is not influenced, and meanwhile, the glue spraying difficulty is lowered by reducing the change of the glue quantity.

The dimension relation between the distance H from the bottom end of the glue overflow notch to the positioning column and the height C of the positioning column is as follows: h=c/3, the design is to control the glue capacity in the female seam allowance groove in a controllable range, and ensure that no glue overflow occurs during assembly. The size relation between the distance B between the bottom of the positioning groove and the tail end of the positioning column and the height C of the positioning column is as follows: b is less than or equal to C/3; the design keeps the depth of the bottom of the positioning groove from the tail end of the positioning column, which cannot exceed 1/3 of the height of the positioning column at maximum, and the excessive design has no meaning but can cause difficult development of the later plastic mold and product reliability.

Drawings

Fig. 1 is a schematic structural view of a second product housing.

Fig. 2 is a schematic structural view of the first product housing.

Fig. 3 is a schematic cross-sectional structure of the assembly of the positioning post and the positioning groove.

Fig. 4 is a schematic diagram of a front structure of the positioning column and the positioning groove assembled.

Fig. 5 is a schematic front view of another structure of a positioning post and positioning slot assembly.

Reference numerals illustrate: the device comprises a first product shell 2, a positioning column 21, a second product shell 1, a positioning groove 11 and a glue overflow notch 111.

Detailed Description

Referring to fig. 1-4, the present utility model relates to a fitting structure for avoiding glue overflow, comprising a plurality of positioning columns 21 at the bottom of a first product housing 2 and a plurality of positioning slots 11 at the inner wall of a second product housing 1, wherein each positioning slot 11 is provided with a glue overflow notch 111 near the side wall of the inner cavity of the second product housing 1, wherein the positioning columns 21 are inserted into the positioning slots 11, and the distance from the bottom ends of the glue overflow notches 111 to the positioning columns 21 is defined as H, wherein the height of the positioning columns 21 is defined as C, and the two have the following dimensional relationship: h=c/3; and the distance from the bottom of the positioning groove 11 to the end of the positioning column 21 is defined as B, wherein the following dimensional relationship exists between the two: b is less than or equal to C/3.

The middle part of the positioning groove 11 is provided with a glue overflow notch 111, so that the required glue quantity of the positioning groove 11 can be greatly relaxed. After the glue overflow notch 111 is formed, the glue amount can be controlled to be 0.4-0.6g, unified glue spraying of different positioning grooves 11 is realized, even if the glue is sprayed, the glue can flow out of the glue overflow notch 111, the performance is not affected, and meanwhile, the glue spraying difficulty can be reduced by reducing the change of the glue amount. The dimension relationship between the distance H from the bottom end of the glue overflow notch 111 to the positioning column 21 and the height C of the positioning column 21 is as follows: h=c/3, the design is to control the glue capacity in the female seam allowance groove in a controllable range, and ensure that no glue overflow occurs during assembly. The dimensional relationship between the distance B of the bottom of the positioning groove 11 from the tail end of the positioning column 21 and the height C of the positioning column 21 is as follows: b is less than or equal to C/3; the design keeps the depth of the bottom of the positioning groove 11 from the tail end of the positioning column 21, which cannot exceed 1/3 of the height C of the positioning column 21 at maximum, and the excessive design has no meaning but can cause difficulty in developing a later plastic mold and product reliability.

Further, the inner wall of the positioning groove 11, where the glue overflow notch 111 is provided, is a notch side wall, the inner wall of the positioning groove 11, which is far away from the notch side wall, is a product inner wall, where a first gap exists between the positioning post 21 and the notch side wall, a distance of the first gap is defined as F, a second gap exists between the positioning post 21 and the product inner wall, a distance of the second gap is defined as G, and the two dimensions conform to: f is more than or equal to 3*G.

Second gap G: the small product gap can be properly reduced because the plastic product is characterized by a scaling process of heating, reforming and cooling, and the molding scaling rate of the plastic material PC (carbonic acid polyester) is about 0.5 percent. The small plastic products need to consider the deformation and the molding shrinkage of the products in the design process.

F is not less than 3*G because the glue is usually run in the direction of the large opening under the same pressure in the process of applying the glue. Therefore, the first gap G is designed to be more than 3 times of the second gap F, so that the glue can be prevented from overflowing to the outer side.

Further, the second product housing 1 wall thickness is defined as J, wherein the following dimensional relationship exists between the height C of the positioning post 21 and the second product housing 1 wall thickness J: c is less than or equal to 2*J. The design is used for preventing appearance forming defects of products during injection molding production. In general, the height C of the positioning column 21 is not preferably higher than 2/1 of the wall thickness J, and in the case of ultra-high wall thickness variation is too large, the plastic is extruded from a wider place to a narrow place like water after heating, and obvious extruded marks appear at the transition place.

Referring to fig. 4, further, the width of the positioning post 21 is defined as D, and the following dimensional relationship exists between the width D of the positioning post 21 and the wall thickness J of the second product housing 1: d is less than or equal to 3*J. Referring to fig. 5, further, a glue reducing gap with a width E is further formed at a middle position of the end of the positioning column 21, positioning stop bones located at two sides of the glue reducing gap are further disposed at the end of the positioning column 21, and the width of the positioning stop bones is K, wherein the following dimensional relationship exists between the width E of the glue reducing gap and the width K of the positioning stop bones: e is less than or equal to K.

Here, the complexity of product splitting is considered in product design, the spigot is designed to be sectional type (sectional design production is simple in the case of complex products), and the design of the spigot needs to be carried out in a whole circle in general, because the groove for designing the glue is added. So it is a segmented design. As can be seen from the partial front view of fig. 4, the width D of the positioning post 21 is determined by the housing wall thickness J. The exception is when the product is designed as in the case of partial front view fig. 5. The middle part of the product positioning column 21 needs to be subjected to glue reduction to form a notch. The width E of the glue reducing notch should be smaller than the positioning bone stop width K.

In this embodiment, the first product housing 2 and the second product housing 1 discussed are assembled as bluetooth headset products; the first product housing 2 as well as the second product housing 1 in the present application can also be assembled into other adapted products, such as toys, charging boxes, etc.

The above embodiments are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims (5)

1. The utility model provides a avoid assembling structure of glue that overflows outwards, includes a plurality of reference column that is located first product shell bottom and a plurality of constant head tank that is located second product shell inner wall, its characterized in that: each positioning groove is close to the side wall of the inner cavity of the second product shell and is provided with a glue overflow notch, wherein the positioning column is inserted into the positioning groove, the distance from the bottom end of the glue overflow notch to the positioning column is defined as H, the height of the positioning column is defined as C, and the two have the following dimensional relationship: h=c/3; and the distance between the bottom of the positioning groove and the tail end of the positioning column is defined as B, wherein the two have the following dimensional relationship: b is less than or equal to C/3.

2. The fitting structure for avoiding glue overflow according to claim 1, wherein; wherein the constant head tank is provided with the inner wall of glue overflow breach and is the breach lateral wall, and the inner wall that the constant head tank kept away from the breach lateral wall is the product inner wall, and wherein there is first clearance between reference column and the breach lateral wall, and the distance of this first clearance is defined as F, has the second clearance between reference column and the product inner wall, and the distance of this second clearance is defined as G, and wherein both sizes accord with: f is more than or equal to 3*G.

3. The fitting structure for avoiding glue overflow according to claim 2, wherein: the second product housing wall thickness is defined as J, wherein the following dimensional relationship exists between the height C of the locator post and the second product housing wall thickness J: c is less than or equal to 2*J.

4. A glue overflow preventing assembly structure according to claim 3, characterized in that: the width of the positioning column is defined as D, and the following dimensional relationship exists between the width D of the positioning column and the wall thickness J of the second product shell: d is less than or equal to 3*J.

5. A glue overflow preventing assembly structure according to claim 3, characterized in that: the end intermediate position of reference column has still offered the width and has been reduced gluey breach for E, and the end of reference column still is provided with the location that is located the gluey breach both sides and ends the bone, and the width that should fix a position the bone is K, wherein reduces the width E of gluey breach and the width K that fixes a position and end the bone between have following dimensional relation: e is less than or equal to K.