JP2019054094A - Housing connection structure - Google Patents

Abstract

To provide a housing connection structure which prevents rattling from occurring in a direction perpendicular to a connection direction between two housings.SOLUTION: In a housing connection structure, an engagement claw part 4 is provided at one of two housings, and a claw receiving part 14 which engages with the engagement claw part 4 is provided at the other side. The housing connection structure has recessed parts 15 provided at the one of the housings and arc arm parts 5b, each of which is provided at the other as an elastic protruding part for reducing a width dimension by elastic deflection. The housing connection structure is provided with rattling inhibition parts where the arc arm parts 5b elastically deflected in a direction such that the arc arm part 5b reduces a width direction fit in the recessed parts 15b in a state that the engagement claw parts 4 engage with the claw receiving part 14.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connection structure that connects housings.

  A housing that stores electronic components, batteries, and the like may be connected to a plurality of housings for function expansion, battery capacity expansion, and the like. A structure shown in FIG. 7 has been proposed as a conventional connecting structure of casings (see Patent Document 1).

  As shown in FIG. 7, this conventional housing connection structure includes a male locking portion 51 provided in one housing 50A and a female locking portion 61 provided in the other housing 50B. It has.

  The male side locking part 51 protrudes from the side surface of one housing 50A. The male side locking part 51 has a pair of left and right slide guide walls 52 and a locking protrusion 53 provided between the pair of slide guide walls 52.

  The female side latching part 61 is projected from the side surface of the other casing 50B. The female locking portion 61 includes a pair of left and right rail walls 62, an elastic deflection plate portion 63 provided between the pair of rail walls 62, and a claw portion 64 provided on the elastic deflection plate portion 63.

  The pair of left and right slide guide walls 52 of one housing 50A is inserted into the pair of left and right rail walls 62 of the other housing 50B. Then, the locking projection 53 interferes with the claw portion 64 during the slide insertion process, but the elastic deflection plate portion 63 is bent and deformed inward (in the recess direction), and insertion of the locking projection 53 is allowed. When the locking projection 53 gets over the claw portion 64, the elastic bending plate portion 63 is elastically restored and deformed, and the locking projection 53 and the claw portion 64 are locked. Thus, the two casings 50A and 50B are connected.

JP 2003-257300 A

  In the sliding structure of the pair of slide guide walls 52 and the pair of rail walls 62 of the conventional example, in order to smoothly slide in consideration of the dimensional tolerance of each part, the pair of slide guide walls 52 and the pair of rails are used. It is designed so that a gap is generated between the wall 62 and the wall 62 in the direction N perpendicular to the sliding direction. However, when the pair of slide guide walls 52 and the pair of rail walls 62 are completely slid (in the connected state of the two casings 50A and 50B), the gap in the direction orthogonal to the slide direction is loose in the orthogonal direction N of the connection direction M. There is a problem that occurs.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a housing connection structure in which no vertical backlash occurs in the connecting direction between two housings.

  In the present invention, either one of the two housings is provided with a locking portion, and the other is provided with a mating locking portion for locking to the locking portion. A concave portion provided on one side and opening in the connecting direction; and an elastic convex portion provided on the other of the two casings and having a width dimension reduced by elastic deformation. Connection of housings characterized in that there is provided a backlash suppressing portion in which the elastic convex portion that is elastically bent and deformed in the direction of reducing the width direction is engaged with the concave portion while being locked to the side locking portion. Structure.

  According to the present invention, since the gap is not generated between the elastic convex portion and the concave portion by the second backlash suppressing portion, the vertical backlash in the connecting direction does not occur between the two housings.

FIG. 5 is a perspective view showing an embodiment of the present invention before connection between two housings. FIG. 2 shows an embodiment of the present invention and is a cross-sectional view taken along line AA in FIG. 1. 1 shows an embodiment of the present invention, in which (a) is a cross-sectional view of an essential part of a connection structure, and (b) is a cross-sectional view of a claw receiving part. One Embodiment of this invention is shown, (a), (b) is a perspective view which shows each connection process of two housing | casing. One Embodiment of this invention is shown, (a)-(c) is a perspective sectional view which shows a connection process. One Embodiment of this invention is shown, (a)-(c) is a front view which shows a connection process. It is a perspective view of the connection structure of a housing | casing which shows a prior art example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 to 6 show an embodiment of the present invention. In FIG.1 and FIG.2, the connection structure of the housing | casing which concerns on embodiment connects two housing | casing 1A, 1B directly. Each housing 1A, 1B accommodates electronic components, batteries, and the like.

  One housing 1A has an upper surface as a connection surface 2a and a lower surface as a surface 2b opposite to the connection surface 2a. The other housing 1B has a lower surface as a connecting surface 2a and an upper surface as a surface 2b opposite to the connecting surface 2a. An insertion hole 3 that is a pair of insertion portions is provided at a symmetrical position of one housing 1A. Each insertion hole 3 is a rectangular hole and opens to the connection surface 2a and the opposite surface 2b.

  In each insertion hole 3, as shown in detail in FIG. 2, a locking claw portion 4 as a locking portion and an elastic arm portion 5 as a backlash suppressing portion are provided.

  The locking claw portion 4 is supported in a cantilevered state on the inlet side of the insertion hole 3. The locking claw part 4 changes in the direction which makes the protrusion amount in the insertion hole 3 small by elastic deformation.

  The elastic arm portion 5 is disposed on the insertion back side with respect to the locking claw portion 4. The elastic arm portion 5 includes a pair of linear arm portions 5a supported on the housing 1A side and an arc arm portion (convex arm portion) 5b that is an elastic convex portion that connects the tips of the pair of linear arm portions 5a. Is formed. The pair of linear arm portions 5a are inclined so as to gradually narrow the distance toward the tip. The outer diameter (width dimension) R2 of the arc arm portion 5b is larger than an arc groove 15 described below in a no-stress state, and is dimensioned to fit into the arc groove 15 in a reduced diameter state. .

  The elastic arm portion 5 is a double-supported arm, and the position of the arc arm portion 5b is changed by bending and deforming the pair of linear arm portions 5a and the like in the insertion process (connection process) of the protrusion 10 into the insertion hole 3. It changes to the insertion back side. Further, the arc arm portion 5b is elastically deformed in the direction of diameter reduction by being displaced in a direction in which the distance between the tips of the pair of linear arm portions 5a is narrowed by the bending deformation of the pair of linear arm portions 5a.

  A pair of protrusions 10 are provided on the connecting surface 2a of the other housing 1B. Each protrusion 10 has a back wall 11 and a pair of side walls 12 protruding from both sides of the back wall 11. Each projecting member 10 is formed in a size that can be inserted into each insertion hole 3 of the housing 1A with almost no gap.

  The back wall 11 is provided with a claw receiving portion 14 which is a mating side locking portion. Each claw receiving portion 14 has a tapered surface 14a that gradually increases from the lower end of the protruding portion 10 toward the upper end, and the upper end of the tapered surface 14a is formed on the upper end vertical surface 14b.

  The arcuate groove 15 is provided at the lower end of the projecting portion 10 in the connecting direction M. The arc groove 15 is open toward the connecting direction M to the housing 1A. The arc groove 15 is provided so as to cut out a part of each claw receiving portion 14. Each arcuate groove 15 is a semicircular or more groove. The groove diameter (width dimension) R1 of each arc groove 15 is formed smaller than the outer diameter R2 of the arc arm portion 5b when no stress is applied.

  Next, a procedure for connecting the two casings 1A and 1B will be described. As shown in FIG. 4 (a), each protrusion 10 of the other housing 1B is inserted into each insertion hole 3 opened in the connecting surface 2 of one housing 1A.

  Then, as shown in FIGS. 5 (a) and 6 (a), the tip of the claw receiving portion 14 of the protruding portion 10 first strikes the locking claw portion 4. When the protruding portion 10 is further inserted into the insertion hole 3 from this state, the locking claw portion 4 is elastically deformed and insertion of the protruding portion 10 is allowed. Then, as shown in FIGS. 5B and 6B, the lower end surface of the protrusion 10 (the lower end surface of the claw receiving portion 14) abuts against the arc arm portion 5 b of the elastic arm portion 5. When the protruding portion 10 is further inserted into the insertion hole 3 from this state, the pair of linear arm portions 5a are bent and deformed, the arc arm portion 5b is gradually displaced downward, and the arc arm portion 5b is reduced in the diameter reducing direction ( It is elastically deformed in the direction of decreasing the lateral width.

  Due to the downward displacement of the arc arm portion 5b, further insertion of the protruding portion 10 into the insertion hole 3 is allowed. And if the nail | claw receiving part 14 of the protrusion part 10 gets over the latching claw part 4 by the side of the housing | casing 1A, the latching claw part 4 will bend and will return-deform. Further, when the diameter of the arc arm portion 5 b is gradually reduced and reduced to an outer diameter (horizontal width dimension) that can enter the arc groove 15, the arc arm portion 5 b is fitted into the arc groove 15.

  Thereafter, when the insertion of the protruding portion 10 into the insertion hole 3 is stopped, as shown in FIGS. 5C and 6C, the pair of linear arm portions 5a has the arc arm portions 5b enter the arc grooves 15. As a result, it bends and displaces in the return direction. Due to the deformation of the pair of linear arm portions 5a in the bending return direction, the arc arm portion 5b attempts to elastically return and deform in the diameter increasing direction, and the arc arm portion 5b is subjected to the reaction force S (FIG. 6C) due to the elastic return force. Is fitted to the inner surface of the arc groove 15. This prevents backlash between the housing 1A and the protruding portion 10, that is, in the orthogonal direction N of the connecting direction M of the two housings 1A and 1B.

  Further, as shown in FIGS. 5C and 6C, the protruding portion 10 is changed to a position where the claw receiving portion 14 is locked to the locking claw portion 4 by elastic return deformation of the elastic arm portion 5. At the same time, the claw receiving portion 14 is locked to the locking claw portion 4 in a state of receiving the elastic restoring force of the elastic arm portion 5 in the locking direction. In other words, the claw receiving portion 14 is sandwiched between the locking claw portion 4 and the elastic arm portion 5. Thereby, the backlash of the connection direction M between the housing | casing 1A and the protrusion part 10, ie, the two housings 1A and 1B, is also prevented.

  As described above, in the connection structure of the housings according to the embodiment, the locking claw portion 4 is provided in one of the two housings 1A and 1B, and the locking claw portion 4 is provided in the other. A claw receiving portion 14 to be locked is provided, an arc groove 15 which is a concave portion provided in one of the two housings 1A and 1B, and an elastic bending deformation provided in the other of the two housings 1A and 1B. And the arcuate arm portion 5b, which is an elastic convex portion that reduces the width dimension, and is elastically deformed in the direction of reducing the width direction while the locking claw portion 4 is locked to the claw receiving portion 14. A backlash suppressing portion B in which the arc arm portion 5b is fitted into the arc groove 15 is provided. Therefore, since the gap is not generated between the arc arm portion 5b and the arc groove 15 by the second backlash suppressing portion B, the backlash in the vertical direction N of the connecting direction M does not occur between the two casings 1A and 1B.

  The backlash suppressing portion B is provided in the housing 1B, and is provided in the housing 1A with a circular groove 15 that is a recess opening in the connecting direction M to the housing 1A. A pair of linear arm portions 5a that are displaced to each other, and an elastic arm portion 5 that has an arcuate arm portion 5b that is an elastic convex portion (convex arm portion) that connects the tips of the pair of linear arm portions 5a, In the connecting process, the pair of linear arm portions 5a is elastically deformed in a direction that narrows the distance between the tips, and the arc arm portions 5b are elastically deformed in the direction of diameter reduction due to the elastic deformation of the pair of linear arm portions 5a. In a state where the pawl portion 4 is locked to the claw receiving portion 14, the arc arm portion 5b is fitted into the arc groove 15, and the arc arm portion 5b is recovered by the elastic deflection return force of the pair of linear arm portions 5a. Is urged in the connecting direction M, which is the locking direction And, biasing the arcuate groove 15 in the perpendicular direction N of the connecting direction M in diameter direction of the elastic deflection restoring force of the arcuate arm portion 5b.

  Therefore, the backlash suppressing portion B can be constituted by the concave portion 15 and the elastic arm portion 5, and the configuration is simplified. The elastic arm portion 5 biases the claw receiving portion 14 in the locking direction in a state where the locking claw portion 4 is locked to the claw receiving portion 14. Therefore, there is no backlash in the connecting direction M between the one housing 1A and the protruding portion 10, that is, between the two housings 1A and 1B.

  Only when the protruding portion 10 is inserted until the arc arm portion 5b completely enters the arc groove 15, the claw receiving portion 14 gets over the locking claw portion 4, and the locking claw portion 4 is elastically bent and deformed. In other words, when the projecting portion 10 is not inserted until the arc arm portion 5b completely enters the arc groove 15 (see FIGS. 5B and 6B), the claw receiving portion 14 is engaged with the locking claw portion 4. Therefore, if the insertion of the protruding portion 10 is stopped at this point, the linear arm portion 5 returns to elastic deformation and the protruding portion 10 is displaced in the connection release direction. Therefore, the half fitting of the protrusion part 10 does not occur.

  A dimensional error or the like between each housing 1A, 1B and the protruding portion 10 is absorbed by the amount of elastic deformation of the elastic arm portion 5.

  The pair of linear arm portions 5a are arranged to be inclined so as to gradually narrow the distance toward the tip. Therefore, when the elastic arm portion 5 is pressed by the protruding portion 10, it is elastically deformed so as to reliably narrow the distance between the tips.

  The concave portion is an arc-shaped arc groove 15, and the convex arm portion is an arc-shaped arc arm portion 5 b having a larger outer diameter than the arc groove 15. Accordingly, since the arc arm portion 5b fitted into the arc groove 15 is in close contact with the entire inner surface of the arc groove 15 and applies a reaction force S (elastic restoring force) S that is equal to the left and right, there is a backlash in the orthogonal direction N of the connecting direction M. Can be prevented by a reaction force S that is equal to the left and right.

  The two casings 1A and 1B are connected in a state where the connecting surfaces 2a are in contact with each other. An insertion hole 3 is opened in the connecting surface 2a of the casing 1A, and an insertion hole 3 is formed in the casing 1B. A protruding portion 10 to be inserted is provided, a claw receiving portion 14 that is a locking portion is provided in the insertion hole 3, and a claw receiving portion 14 that is a counterpart locking portion is provided in the protruding portion 10. Therefore, when the two casings 1A and 1B are connected, the insertion hole 3 is hardly exposed to the outside, and the protruding portion 10 is hardly visible from the outside.

  The locking part is an elastically deformable locking claw part 4, and each counterpart locking part is allowed to be inserted into the insertion hole 3 due to the elastic deformation of the locking claw part 4. It is the nail | claw receiving part 14 which the latching claw part 4 latches by elastic return deformation | transformation.

(Other)
In the embodiment, the elastic convex portion is the arc arm portion 5b having an arc frame shape. However, the elastic convex portion is a reaction force in the orthogonal direction N of the connecting direction M in a state where the elastic convex portion is fitted in the circular arc groove 15 which is a concave portion ( Any convex arm portion capable of acting a component force) may be used. For example, the convex arm portion may be a quadrilateral or more polygon. If it is a polygon more than a quadrangle, a reaction force (including a component force) can be applied in the orthogonal direction N of the connecting direction while being fitted in the arc groove 15 that is a recess.

  In the above embodiment, the connecting member 10 is provided with the arc groove (recessed portion) 15 and the housings 1A and 1B are provided with the elastic arm portion 5. However, the connecting member 10 is provided with the elastic arm portion 5 and the housings 1A and 1B. An arc groove (concave portion) 15 may be provided in 1B.

  In the embodiment, the locking claw portion 4 of the housing 1B is formed so as to be elastically deformed, and the claw receiving portion 14 of the protrusion 10 of the housing 1A is formed so as not to be elastically deformed. 4 may be formed so as to be elastically deformed, and the claw receiving portion 14 may be formed so as not to be elastically deformed. Moreover, you may form so that both the latching claw part 4 and the nail | claw receiving part 14 may elastically deform together. Further, the locking portion and the other-side locking portion do not have to be claw-shaped, and may be any structure that is locked to each other by insertion of the protruding portion 10 into the insertion hole 3.

  In the above-described embodiment, the case where two casings 1A and 1B are connected has been described. However, the connection structure of the present invention can also be applied to a case where three or more casings are connected.

  In the embodiment, the insertion portion is the insertion hole 3 that opens to the connection surface 2a, but may be a groove portion that opens to the connection surface 2a.

1A, 1B Housing 2a Connecting surface 3 Insertion hole (insertion part)
4 Locking claw (locking part)
5 Elastic arm part (backlash control part)
5a Linear arm part 5b Arc arm part (elastic convex part, convex arm part)
10 Protruding part 14 Claw receiving part (mating side locking part)
15 Arc groove (concave)

Claims (6)

Either one of the two housings is provided with a locking portion, and the other is provided with a mating locking portion that locks to the locking portion,
A concave portion that is provided in one of the two housings and that opens in the connecting direction; and an elastic convex portion that is provided in the other of the two housings and reduces the width dimension by elastic bending deformation; In the state in which the locking portion is locked to the counterpart locking portion, there is provided a backlash suppressing portion in which the elastic convex portion that is elastically bent and deformed in the direction of reducing the width direction is fitted into the concave portion. Characteristic housing connection structure. It is the connection structure of the housing | casing of Claim 1, Comprising:
In addition to the concave portion, the backlash suppressing portion includes a pair of linear arm portions that are displaced in a direction of narrowing the distance between the tip ends in the connection process between the two housings, and between the tip ends of the pair of linear arm portions. An elastic arm portion having a convex arm portion which is the elastic convex portion to be connected;
In the connecting process between the two casings, the pair of linear arm portions are elastically deformed in a direction of narrowing the distance between the ends, and the convex arm portions are dimensioned by elastic deformation of the pair of linear arm portions. Elastic deformation in the direction of narrowing,
In a state where the locking portion is locked to the counterpart locking portion, the convex arm portion is fitted into the concave portion, and the convex arm portion is caused by the elastic bending return force of the pair of linear arm portions. The casing is characterized in that the other-side latching portion is urged in the latching direction, and the convex arm portion presses the inner surface of the concave portion with an elastic bending return force in a direction in which the width of the convex arm portion increases. Connected structure. It is the connection structure of the housing | casing of Claim 2, Comprising:
A pair of said linear arm parts are inclined and arranged so that a space | interval may be gradually narrowed toward a front-end | tip, The connection structure of the housing | casing characterized by the above-mentioned. It is the connection structure of the housing | casing in any one of Claims 1-3,
The recess is an arc-shaped arc groove,
The connecting structure for a casing, wherein the convex arm portion is an arc frame-shaped arc arm portion having a larger outer diameter than the arc groove. It is the connection structure of the housing | casing in any one of Claims 1-4,
Two said housings are connected in a state of contacting each other's connecting surfaces,
An insertion part is opened on the connection surface of any one of the casings, and a projection part inserted into the insertion part is provided on the other side.
The connecting structure of the housing, wherein the locking portion of any one of the insertion portion and the protruding portion is provided, and the other-side locking portion is provided. It is the connection structure of the housing | casing in any one of Claims 1-5,
The locking part is an elastically deformable locking claw part,
Each of the mating locking portions is a claw receiving portion that is allowed to be inserted into the insertion portion by elastic deformation of the locking claw portion, and that the locking claw portion is locked by elastic return deformation of the locking claw portion. A connecting structure for a housing, characterized in that

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