Casing Unit

Abstract

To provide a casing unit which has higher airtightness and liquid tightness and can be easily assembled.SOLUTION: A casing unit has a first casing, and a second casing combined with the first casing from a first direction, in which the first casing has a first casing body and a projection, the second casing has a second casing body formed with a storage groove for storing the projection, a guide part for relatively moving the first casing and the second casing in a second direction is formed on either the projection or the second casing body in association with combination of the first casing and the second casing, and the second casing overlaps the first casing body in the first direction in the combined state, and further has a lap part that is elastically deformable in association with relative movement of the first casing and the second casing in the second direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a casing unit. [Background technology]

[0002] For example, an HVAC unit of an air conditioner for a vehicle mainly includes devices such as a heat exchanger and a fan, and a resin casing unit that covers these devices from the outside. Inside the casing unit, a flow path is formed through which the air generated by the fan flows. In order to supply the air to the vehicle interior without loss, it is important to maintain the airtightness of such a flow path.

[0003] As a measure for ensuring airtightness of a casing unit, for example, the one described in Patent Document 1 below is known. The air conditioning case according to Patent Document 1 below has a recessed portion provided in a first case body and a protruding portion provided in a second case body and inserted into the recessed portion. A tapered portion is formed on the side of the protruding portion. As the protruding portion is inserted into the recessed portion, it is pressed against the tapered portion, causing elastic deformation so that the recessed portion widens. This is said to bring the first case body and the second case body into close contact with each other, maintaining airtightness between them. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-177198 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the recessed portion elastically deforms to widen as described above, a large force is required to insert the protruding portion, which may hinder smooth assembly of the casing unit.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a casing unit that has higher airtightness and liquid-tightness and can be easily assembled. [Means for solving the problem]

[0007] In order to solve the above problems, a casing unit according to the present disclosure is a casing unit having a first casing and a second casing that is assembled to the first casing from a first direction, the first casing has a first casing main body and a protruding portion that protrudes from the first casing main body towards the second casing side, the second casing has a second casing main body in which an accommodating groove is formed in which the protruding portion is accommodated, one of the protruding portion and the second casing main body is formed with a guide portion that causes the first casing and the second casing to move relatively in a second direction intersecting the first direction as the first casing and the second casing are assembled in the first direction, the second casing further has a wrap portion that overlaps with the first casing main body in the first direction in the assembled state and is elastically deformable as the first casing and the second casing move relatively in the second direction, and a surface of the protruding portion facing the second direction and a surface of the accommodating groove facing the second direction extend in the first direction and are in surface contact with each other in the assembled state, The protrusion is formed on a first end face of the first casing body facing the first direction, and in a cross-sectional view perpendicular to the first direction, has a tip portion extending in the first direction and a tapered portion serving as the guide portion extending in the second direction from the tip portion toward the first end face, and the tapered portions are arranged at intervals in a direction perpendicular to the first direction and the second direction, which are the extension directions of the protrusion. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a casing unit that has higher airtightness and liquid-tightness and can be easily assembled. [Brief description of the drawings]

[0009] [Figure 1] 2 is a schematic diagram showing a configuration of a casing unit according to the first embodiment of the present disclosure. FIG. [Diagram 2] 2 is an enlarged cross-sectional view of a main portion of a casing unit according to the first embodiment of the present disclosure. FIG. [Diagram 3] 1 is an explanatory diagram showing a state in the middle of assembling a casing unit according to a first embodiment of the present disclosure. FIG. [Figure 4] 10 is an enlarged cross-sectional view of a main portion showing a modified example of the casing unit according to the first embodiment of the present disclosure. FIG. [Diagram 5] FIG. 11 is an enlarged cross-sectional view of a main portion of a casing unit according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] First Embodiment (Casing unit configuration) A casing unit 100 according to a first embodiment of the present disclosure will be described below with reference to Fig. 1 to Fig. 3. The casing unit 100 is a resin container that houses, for example, a fan, a heat exchanger, a damper, and the like of an air conditioner for a vehicle. As shown in Fig. 1, the casing unit 100 includes a first casing 1 that constitutes the lower half, and a second casing 2 that constitutes the upper half and is combined with the first casing 1. Inside the first casing 1 and the second casing 2, spaces for housing the above-mentioned various devices and flow paths for guiding the blown air are formed.

[0011] The first casing 1 and the second casing 2 are provided with a plurality of engagement portions 3 that fix the first casing 1 and the second casing 2 together so that they cannot come off from each other. In the following description, the direction in which the first casing 1 and the second casing 2 are assembled is referred to as a first direction D1. Furthermore, among the horizontal directions perpendicular to the first direction D1, the direction corresponding to the inward and outward directions of the casing unit 100 is referred to as a second direction D2.

[0012] (Configuration of the first casing) Next, the configuration of the joint of the casing unit 100 will be described with reference to Fig. 2. Fig. 2 shows a cross section of a portion different from the above-mentioned engagement portion 3. As shown in the figure, the first casing 1 has a first casing body 10, a protruding portion 10P, and a tapered portion 10T.

[0013] The first casing body 10 has a first end face 10S facing one side in a first direction D1, an outer surface 10W extending from one edge of the first end face 10S in a second direction D2 toward the other side of the first direction D1, and an inner surface 10D facing the opposite side to the outer surface 10W in the second direction D2.

[0014] A protruding portion 10P is provided on the first end surface 10S. The protruding portion 10P protrudes from the first end surface 10S toward one side in the first direction D1. The dimension of the protruding portion 10P in the second direction D2 (i.e., the thickness) is set to be smaller than the dimension of the first end surface 10S in the second direction D2.

[0015] The protrusion 10P has a base R and a tip T. Both sides of the base R in the second direction D2 extend parallel to the first direction D1. The tip T has a tapered cross-sectional shape in which the dimension in the second direction D2 gradually decreases toward one side of the first direction D1.

[0016] A tapered portion 10T is formed as a guide portion between the base R of the protruding portion 10P and the first end surface 10S. The tapered portion 10T extends from a surface of the base R facing one side in the second direction D2 to the first end surface 10S. More specifically, the tapered portion 10T has an edge that extends toward one side in the second direction D2 as it moves from the base R toward the first end surface 10S. A plurality of such tapered portions 10T are provided at intervals over the entire extension length of the protruding portion 10P.

[0017] The outer surface 10W has a main surface 10A, an inclined surface 10B, and a parallel surface 10C. The main surface 10A and the parallel surface 10C extend in a first direction D1. The inclined surface 10B extends at an angle toward one side of a second direction D2 as it moves from the main surface 10A side toward the parallel surface 10C side. These outer surfaces 10W are surfaces that face the outside of the casing unit 100.

[0018] The inner surface 10D faces the opposite side to the main surface 10A and faces the inside of the casing unit 100. A recess 10R is formed in a portion of the inner surface 10D that overlaps with the inclined surface 10B and the parallel surface 10C in the first direction D1. The recess 10R is recessed from the inner surface 10D toward one side in the second direction D2.

[0019] Specifically, the recess 10R is formed by a bottom surface R1 facing one side in the first direction D1 and a side surface R2 connected to the bottom surface R1 and facing the other side in the second direction D2. The upper end of the side surface R2 is continuous with the base R of the protrusion 10P. In other words, there is no step or the like between the base R and the side surface R2.

[0020] (Configuration of the second casing) The second casing 2 has a second casing body 20 and a wrap portion 20R. The second casing body 20 has a thickness that is approximately the same as the thickness from the parallel surface 10C to the inner surface 10D of the first casing body 10 (i.e., the dimension in the second direction D2). The second casing body 20 has an outer surface 20A facing outward, an inner surface 20B facing inward, and a second end surface 20C facing the other side in the first direction D1 (i.e., facing the first casing 1 side).

[0021] The second end face 20C is formed with an accommodation groove 20H in which the protruding portion 10P is accommodated. The accommodation groove 20H is recessed from the second end face 20C toward one side in the first direction D1. The dimension of the accommodation groove 20H in the second direction D2 is set to be slightly larger than the dimension of the protruding portion 10P in the second direction D2. In addition, when the first casing 1 and the second casing 2 are combined, a gap is formed between the end face on one side of the protruding portion 10P in the second direction D2 and the accommodation groove 20H. On the other hand, the end face on the other side of the protruding portion 10P and the accommodation groove 20H are in close contact with each other. In addition, at this time, the corner portion C1 between the second end face 20C and the accommodation groove 20H is in contact with the tapered portion 10T.

[0022] A wrap portion 20R is provided on the other side of the second end surface 20C in the second direction D2. The wrap portion 20R extends from the second end surface 20C toward the other side of the first direction D1. The thickness of the wrap portion 20R (i.e., the dimension in the second direction D2) is set smaller than the thickness of the second casing body 20. The length of the wrap portion 20R (i.e., the dimension in the first direction D1) is set larger than the length of the protruding portion 10P. When the first casing 1 and the second casing 2 are assembled together, the wrap portion 20R closes the recess 10R from the other side of the second direction D2. At this time, the wrap portion 20R is elastically deformed so as to be slightly curved toward the other side of the second direction D2 with the connection portion with the second end surface 20C as a fulcrum. That is, the wrap portion 20R abuts against the inner surface 10D with an elastic restoring force applied thereto.

[0023] (Action and effect) Next, the behavior of each part when assembling the casing unit 100 will be described with reference to Fig. 3. As shown in the figure, when assembling the casing unit 100, first, the first casing 1 and the second casing 2 are placed facing each other in a first direction D1. Next, the second casing 2 is moved in the first direction D1 relative to the first casing 1 until the protruding portion 10P is inserted halfway into the housing groove 20H. At this time, the wrap portion 20R is in contact with the inner surface 10D but is not elastically deformed.

[0024] From the above state, the second casing 2 is further moved in the first direction D1. Then, the corner C1 of the accommodation groove 20H comes into contact with the tapered portion 10T. If the second casing 2 is further moved, the corner C1 is guided by the tapered portion 10T, and the entire second casing 2 moves toward one side in the second direction D2. That is, the second casing 2 moves in the second direction D2 relative to the first casing 1. As a result, when the protrusion 10P is entirely accommodated in the accommodation groove 20H, as described above with reference to FIG. 2, the protrusion 10P and the inner surface of the accommodation groove 20H come into close contact with each other. At this time, since the second casing 2 has moved in the second direction D2, the wrap portion 20R comes into contact with the inner surface 10D and is elastically deformed.

[0025] According to the above configuration, the first casing 1 and the second casing 2 move relatively in the second direction D2 by the tapered portion 10T as a guide portion, so that the first casing 1 and the second casing 2 are brought into a state of being tightly and closely contacted with each other. This ensures even higher airtightness and liquidtightness. In addition, since the wrap portion 20R elastically deforms while overlapping with the first casing body 10, the wrap portion 20R can further improve the airtightness and liquidtightness. Furthermore, since the portion that is elastically deformed during assembly is limited to the wrap portion 20R, assembly can be easily performed without requiring a large force.

[0026] Furthermore, with the above configuration, the dimensions of the wrap portion 20R are larger than those of the protrusion 10P, so that the wrap portion 20R can be more easily elastically deformed as the protrusion 10P is inserted, thereby facilitating assembly without requiring a large force.

[0027] Furthermore, according to the above configuration, when the protruding portion 10P is inserted into the housing groove 20H, the second casing 2 moves relatively in the second direction D2 along the tapered portion 10T. This allows the first casing 1 and the second casing 2 to be strongly and closely attached to each other. Furthermore, by forming the tapered portion 10T, the base R of the protruding portion 10P (the portion opposite the tip portion T) can be made large, which can increase the strength of the protruding portion 10P.

[0028] The first embodiment of the present disclosure has been described above. Various changes and modifications can be made to the above configuration without departing from the gist of the present disclosure. For example, as shown in FIG. 4, it is possible to adopt a configuration in which the tapered portion 10T' is formed over the entire side surface of the protruding portion 10P facing the second direction D2, that is, over the entire extension length of the base portion R. According to this configuration, the tapered portion 10T' can cause the first casing 1 and the second casing 2 to move relatively to a greater extent. This allows the first casing 1 and the second casing 2 to be brought into even closer contact with each other.

[0029] Second Embodiment Next, a second embodiment of the present disclosure will be described with reference to Fig. 5. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in Fig. 5, in this embodiment, instead of the tapered portion 10T described above, a guide protrusion 30 and a guide groove 30R are formed as guide portions in the first casing 1 and the second casing 2, respectively.

[0030] The guide protrusion 30 protrudes from the second end surface 20C of the second casing 2 toward the other side in the first direction D1. The cross-sectional shape of the guide protrusion 30 is a right-angled triangle. More specifically, the hypotenuse in the cross section of the guide protrusion 30 extends toward one side in the second direction D2 as it approaches the other side in the first direction D1.

[0031] The guide groove 30R accommodates the guide protrusion 30. The guide groove 30R is recessed from the first end face 10S of the first casing 1 toward the other side in the first direction D1. The cross-sectional shape of the guide groove 30R is the same as the cross-sectional shape of the guide protrusion 30. Note that the term "same" here refers to being substantially the same, and design tolerances and manufacturing errors are allowed. In a state where the first casing 1 and the second casing 2 are opposed to each other before being combined, the guide groove 30R is formed at a position shifted to one side in the second direction D2 from the guide protrusion 30. Note that the guide protrusion 30 and the guide groove 30R may be formed continuously around the entire circumference of the first end face 10S and the second end face 20C, or may be provided in a plurality at intervals.

[0032] According to the above configuration, when the protruding portion 10P is inserted into the accommodation groove 20H, the guide protrusion 30 is accommodated in the guide groove 30R. Here, the guide groove 30R is formed at a position shifted in the second direction D2 from the guide protrusion 30. As a result, the first casing 1 and the second casing 2 can be moved relatively in the second direction D2 by the guide protrusion 30 and the guide groove 30R abutting against each other in a sliding manner. As a result, the first casing 1 and the second casing 2 can be brought into strong and intimate contact with each other.

[0033] The second embodiment of the present disclosure has been described above. Various changes and modifications can be made to the above configuration without departing from the gist of the present disclosure. For example, in the second embodiment, an example has been described in which the guide protrusion 30 is provided on the second casing 2 and the guide groove 30R is formed on the first casing 1. However, it is also possible to adopt a configuration in which the guide protrusion 30 is provided on the first casing 1 and the guide groove 30R is formed on the second casing 2. It is also possible to apply the tapered portion 10T described in the first embodiment in combination with the configuration of the second embodiment.

[0034] Furthermore, unlike the above-described embodiments, the casing unit 100 can be used to house mechanical devices other than a vehicle air conditioner. The external appearance of the casing unit 100 shown in Fig. 1 is an example, and various shapes, dimensions, and sizes can be used depending on the design and specifications.

[0035] <Additional Notes> The casing unit 100 described in each embodiment can be understood, for example, as follows.

[0036] (1) A casing unit 100 according to a first aspect is a casing unit 100 having a first casing 1 and a second casing 2 assembled to the first casing 1 from a first direction D1, the first casing 1 having a first casing body 10 and a protruding portion 10P protruding from the first casing body 10 toward the second casing 2, the second casing 2 having a second casing body 20 having an accommodating groove 20H in which the protruding portion 10P is accommodated, the protruding portion 10P and the second casing body In one of the first casing body 10 and the second casing body 20, a guide portion is formed which causes the first casing 1 and the second casing 2 to move relatively in a second direction D2 intersecting the first direction D1 as the first casing 1 and the second casing 2 are combined in the first direction D1, and the second casing 2 further has a wrap portion 20R which overlaps with the first casing body 10 in the first direction D1 when combined, and which is elastically deformable as the first casing 1 and the second casing 2 move relatively in the second direction D2.

[0037] According to the above configuration, the first casing 1 and the second casing 2 move relatively in the second direction D2 by the guide portion, so that the first casing 1 and the second casing 2 come into strong and close contact with each other. In addition, since the portion that is elastically deformed during assembly is limited to only the wrap portion 20R, assembly can be easily performed without requiring a large force.

[0038] (2) In the casing unit 100 according to the second aspect, the dimension of the wrap portion 20R in the first direction D1 is set to be larger than the dimension of the protrusion 10P in the first direction D1.

[0039] According to the above configuration, the dimensions of the wrap portion 20R are larger than those of the protrusion 10P, so that the wrap portion 20R can be more easily elastically deformed as the protrusion 10P is inserted.

[0040] (3) In the casing unit 100 of the third aspect, the protrusion 10P is formed on a first end face 10S of the first casing body 10 facing the first direction D1, and in a cross-sectional view perpendicular to the first direction D1, has a tip portion T extending in the first direction D1 and a tapered portion 10T as the guide portion extending in the second direction D2 from the tip portion T toward the first end face 10S.

[0041] According to the above configuration, when the protruding portion 10P is inserted into the accommodating groove 20H, the second casing 2 moves relatively in the second direction D2 along the tapered portion 10T. This allows the first casing 1 and the second casing 2 to be strongly and closely contacted with each other.

[0042] (4) In the casing unit 100 according to the fourth aspect, the tapered portion 10T' is formed over the entire surface of the protruding portion 10P facing the second direction D2.

[0043] According to the above configuration, the tapered portion 10T' allows the first casing 1 and the second casing 2 to move relatively to a greater extent.

[0044] (5) In the casing unit 100 of the fifth aspect, the protrusion 10P is formed on a first end face 10S of the first casing body 10 facing the first direction D1, the accommodating groove 20H is formed on a second end face 20C of the second casing body 20 opposite the first end face 10S, and the guide portion has a guide protrusion 30 protruding from one of the first end face 10S and the second end face 20C toward the other, and a guide groove 30R formed on the other of the first end face 10S and the second end face 20C, which accommodates the guide protrusion 30 and is formed at a position shifted in the second direction D2 from the guide protrusion 30.

[0045] According to the above configuration, when the protruding portion 10P is inserted into the accommodation groove 20H, the guide protrusion 30 is accommodated in the guide groove 30R. The guide groove 30R is formed at a position shifted in the second direction D2 from the guide protrusion 30. This allows the first casing 1 and the second casing 2 to move relatively in the second direction D2. As a result, the first casing 1 and the second casing 2 can be brought into strong and intimate contact with each other. [Explanation of symbols]

[0046] 100 Casing unit 1 First casing 2 Second casing 3 Engagement part 10 First casing body 10A main surface 10B Slope 10C parallel plane 10D inner surface 10P protrusion 10R recess 10S First end surface 10T,10T´ Tapered section 10W external 20 Second casing body 20A external 20B Inner surface 20C Second end face 20H Storage Groove 20R Wrap section 30 Guide protrusion 30R Induction Groove C1 Corner R Base R1 Bottom Surface R2 Side Surface T Tip

Claims

1. A casing unit having a first casing and a second casing assembled to the first casing from a first direction, The first casing is A first casing body; a protruding portion protruding from the first casing body toward the second casing; having The second casing is a second casing body having an accommodation groove formed therein for accommodating the protrusion, a guide portion is formed on either the protrusion portion or the second casing body, which guides the first casing and the second casing to move relatively in a second direction intersecting the first direction when the first casing and the second casing are combined in the first direction; the second casing further includes a wrap portion that overlaps with the first casing body in the first direction in the combined state and is elastically deformable in association with relative movement of the first casing and the second casing in the second direction; A surface of the protrusion facing the second direction and a surface of the accommodation groove facing the second direction extend in the first direction, so that the surfaces of the protrusion and the accommodation groove are in surface contact with each other in the combined state; the protrusion is formed on a first end surface of the first casing body facing the first direction, and has, in a cross-sectional view perpendicular to the first direction, a tip portion extending in the first direction and a tapered portion serving as the guide portion extending in the second direction from the tip portion toward the first end surface, The casing unit includes a plurality of tapered portions arranged at intervals in a direction perpendicular to the first direction and the second direction, which are directions in which the protrusion extends.

2. The casing unit according to claim 1 , wherein a dimension of the wrap portion in the first direction is set to be larger than a dimension of the protrusion in the first direction.

3. The casing unit according to claim 1 or 2, wherein the tapered portion is formed over an entire surface of the protruding portion facing the second direction.

4. The protrusion is formed on a first end surface of the first casing body facing the first direction, The housing groove is formed in a second end surface of the second casing body opposite to the first end surface, The induction portion is A guide protrusion protruding from one of the first end surface and the second end surface toward the other; a guide groove formed on the other of the first end surface and the second end surface, the guide groove accommodating the guide protrusion and being formed at a position shifted from the guide protrusion in the second direction; A casing unit according to any one of claims 1 to 3, comprising:

Images