JP2019192665A - Terminal device - Google Patents

Abstract

To provide a configuration that increases a compressing proportion of a sealing member for sealing a seal space and, at the same time, reduces a filling proportion thereof.SOLUTION: In a main case 20, annular grooves 23, 24 are formed so as to surround first accommodation space 21 and a second accommodation space 22, respectively, in which to-be-accommodated objects are accommodated during fitting. A first case 30 and a second case 40 respectively have counter parts 31, 41 facing the grooves 23, 24 during fitting. An annular sealing member 60 for sealing a seal space S during fitting is disposed in each of the grooves 23, 24. This sealing member 60 is formed such that the shape of a cross-section orthogonal to a direction along the groove 23, 24 comprises: a central part 61; and a plurality of projections 62a to 62d projecting outward from this central part 61.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a terminal device configured with a casing that protects an object to be accommodated by assembling a plurality of cases.

  Conventionally, in a terminal device in which a case is configured by assembling two cases, both cases are provided with O-rings made of rubber or the like in order to ensure the dustproof and waterproof performance of the objects contained in the case. A technique of compressing by inserting into a groove to be a fitting portion of the is adopted. As a structure for ensuring such dustproof and waterproof performance, for example, a waterproof member disclosed in Patent Document 1 below is known.

  This waterproof member is provided in a communication hole that communicates the inside and outside of the housing, and has a mounting member in which a breathing filter is installed in the communication hole. The cylindrical portion is formed so that a flange portion and an annular portion are provided at an end portion inside the casing and an end portion outside the casing, respectively. An O-ring is disposed in an annular space formed by the annular lower surface of the annular portion, the annular outer wall surface facing the annular lower surface of the outer wall surface of the housing, and the annular outer surface of the cylindrical portion, and communicates with the annular space. By providing a waterproof ring that closes the annular gap from the outside, the O-ring is isolated from the external atmosphere, and deterioration of the O-ring is suppressed.

JP 2014-123625 A

  By the way, the terminal device may be required to have a design that can withstand external force due to dropping, a wide temperature range (−20 ° C. to 50 ° C.), aging, and the like depending on the use application. In general, in order to ensure the above performance in a housing in which two cases are assembled, an O-ring is fitted in a seal space formed by a groove formed in one case and a facing portion of the other case. A method of increasing the compression rate of the O-ring in this seal space is adopted.

  Increasing the O-ring wire diameter can increase the compression rate of the O-ring, but simply increasing the O-ring wire diameter increases the filling rate of the O-ring in the seal space. As described above, when the filling rate of the O-ring is increased, there is a problem that when there is a variation in the dimensions of the O-ring, cracks and the like are likely to occur due to the variation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a configuration that can reduce the filling rate while increasing the compression rate of the seal member that seals the seal space. is there.

In order to achieve the above object, the invention described in claim 1 of the scope of claims
A terminal device (10) comprising a casing (11) for protecting an object to be accommodated by assembling one case (20) and the other case (30, 40),
In the one case, an annular groove (23, 24) is formed so as to surround the object to be accommodated when assembled.
The other case is formed with a facing portion (31, 41) that faces the groove when assembled.
An annular seal member (60, 60a) that seals a seal space (S) formed by the groove portion and the facing portion by being pressed by the facing portion during assembly is disposed in the groove portion,
The sealing member has a central portion (61) and a plurality of protrusions (62a to 62f) projecting outward from the central portion at least at a part of the entire circumference in a shape perpendicular to the direction along the groove portion. It is formed so that it may be provided.
In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  According to the first aspect of the present invention, an annular groove is formed in one case so as to surround the object to be accommodated during assembly, and a facing portion is formed in the other case so as to face the groove during assembly. An annular seal member that seals a seal space formed by the groove portion and the facing portion by being pressed by the facing portion during assembly is disposed in the groove portion, and the seal member is arranged in a direction along the groove portion. The shape of the orthogonal cross section is formed so as to include a central portion and a plurality of protruding portions protruding outward from the central portion at least at a part of the entire circumference.

  As a result, when the one case and the other case are assembled, the seal member is elastically deformed and compressed so that the projections are crushed by the pressing of the groove and the opposing portion at least at a part of the entire circumference. . On the other hand, in at least a part of the entire circumference of the seal member, a space is secured by which the protrusions can be elastically deformed in the direction along the outer surface of the central portion by the pressing. For this reason, even if the said compression rate is raised, the filling rate in a seal space is reduced compared with the case where it contacts a groove part and an opposing part in most outer surfaces like an O-ring. Therefore, it is possible to reduce the filling rate while increasing the compression rate of the seal member that seals the seal space.

  In the invention of claim 2, since the seal member is formed so that the cross-sectional shape perpendicular to the direction along the groove portion includes the central portion and the plurality of protrusions over the entire circumference, the seal member extends over the entire circumference of the seal member. The filling rate can be reduced while increasing the compression rate.

  In the invention of claim 3, the shape of the cross section orthogonal to the direction along the groove portion is formed so that the four protruding portions are arranged at equal intervals with respect to the central portion and protrude outward. Thereby, since a sealing member is formed in cross-sectional X shape, it becomes a shape which is hard to twist with respect to the twist at the time of an assembly | attachment, and can improve an assembly | attachment property. In particular, since the four protrusions are arranged at equal intervals, even when an external pressure such as water pressure acts on the seal space from the outside, the external pressure acts in a direction of pressing the protrusions against the groove and the opposed part, which is low. High sealing performance can be maintained even at a compression rate.

It is a figure which shows the structure outline | summary of the portable terminal which concerns on this embodiment, FIG. 1 (A) shows a top view, FIG.1 (B) shows a side view. It is explanatory drawing explaining the state which removed the 1st case from the main case and exposed the 1st accommodation space. It is explanatory drawing explaining the state which removed the 2nd case from the main case and exposed the 2nd accommodation space. FIG. 4A is a cross-sectional view illustrating a state of a seal member that does not receive a compressive force from the groove portion and the facing portion, and FIG. 4B is elastically deformed by receiving the compressive force from the groove portion and the facing portion. It is sectional drawing explaining the state of a sealing member. It is sectional drawing explaining the principal part of the portable terminal which concerns on the modification of this embodiment, FIG. 5 (A) shows the state of the sealing member which does not receive compressive force from a groove part and an opposing part, and FIG. ) Shows a state of the seal member that is elastically deformed by receiving a compressive force from the groove portion and the facing portion.

[First Embodiment]
Hereinafter, a mobile terminal to which a terminal device according to a first embodiment of the present invention is applied will be described with reference to the drawings.
The portable terminal 10 according to the present embodiment is configured as a portable information reading terminal that is carried by a user and used in various places, and a radio tag such as an RFID tag is transmitted through radio waves transmitted and received via an antenna. In addition to the function of reading and writing information stored in the memory, it also has a function as an information code reader that optically reads information codes such as barcodes and two-dimensional codes, and can be read in two ways. .

  As shown in FIGS. 1A and 1B, the mobile terminal 10 has three cases (hereinafter also referred to as a first case 30, a second case 40, and a third case 50) assembled to the main case 20. And a housing 11 for protecting the object to be accommodated. In the casing 11, for example, various electrical components for realizing a function of reading and writing information of a wireless tag and a function of optically reading an information code are accommodated as objects to be accommodated. The electrical configuration in the housing 11 can be the same as that of a known information reading terminal having both functions of a wireless tag reader / writer and an information code reader.

  Further, the main case 20 is provided with a touch panel type display, and the display screen 12 of the display is enlarged so as to be narrowed (narrow bezel), and the surface of the main case 20 Is arranged.

  The first case 30 is a case that constitutes the outline of the optical unit that constitutes at least a part of the function of optically reading the information code, and closes the first accommodation space 21 at the upper part on the back side of the main case 20. To the main case 20. The first case 30 is provided with a reading port 13 that takes in reflected light from the information code so as to open large.

  The second case 40 is a case that constitutes an outer shell of a unit that includes a charging terminal, a connector for external communication, and the like. Assembled. The main case 20 may correspond to an example of “one case”, and the first case 30 and the second case 40 may correspond to an example of “the other case”.

  The third case 50 functions as a battery lid, and is assembled to the main case 20 so as to close the battery housing space located between the first housing space 21 and the second housing space 22 of the main case 20. The third case 50 is detachably attached to the main case 20 even after product shipment, while the first case 30 and the second case 40 are basically not removed after product shipment.

Next, a seal structure when the first case 30 and the second case 40 are assembled to the main case 20 will be described with reference to the drawings.
In the present embodiment, the sealing member 60 made of rubber packing or the like is provided between the main case 20 and the first case 30 and between the main case 20 and the second case 40, so that the dust resistance and waterproofing of the housing 11 can be achieved. The function such as sex is secured.

  Specifically, as shown in FIGS. 2 and 3, an annular groove 23 is formed in the upper part on the back side of the main case 20 so as to surround the first accommodation space 21, and the lower part on the back side of the main case 20. An annular groove 24 is formed so as to surround the second accommodation space 22.

  On the main case 20 side of the first case 30, a facing portion 31 that faces the groove portion 23 is formed at the time of assembly, and the seal space S constituted by the groove portion 23 and the facing portion 31 is sealed by the seal member 60. Thus, the first accommodation space 21 is protected. Further, a facing portion 41 that faces the groove portion 24 at the time of assembly is formed on the main case 20 side of the second case 40, and a seal space S constituted by the groove portion 24 and the facing portion 41 is formed by the seal member 60. The second accommodation space 22 is protected by sealing.

  Here, the seal structure and the like by the seal member 60 will be described in detail with reference to FIG. 4A is a cross-sectional view illustrating a state of the seal member 60 that does not receive the compressive force from the groove 23 (24) and the facing portion 31 (41), and FIG. It is sectional drawing explaining the state of the sealing member 60 which received the compressive force from (24) and the opposing part 31 (41), and was elastically deformed.

  As shown in FIG. 4A, the seal member 60 has four cross-sectional shapes that are perpendicular to the direction along the groove 23 (24) and have four same-shaped protrusions 62a to 62 with respect to the central portion 61. 62d are arranged at equal intervals so as to protrude outward. That is, since the sealing member 60 is formed in an X-shaped cross section over the entire circumference, the sealing member 60 has a shape that is difficult to twist with respect to twisting during assembly.

  The seal member 60 formed in this way is formed in the groove portion 23 so that the two protrusion portions (in the example of FIG. 4A, the protrusion portions 62a and 62b) are in contact with the bottom surface of the groove portion 23 with respect to the first accommodation space 21. Placed inside. In this state, when the first case 30 and the main case 20 are assembled, according to the pressing force from the facing portion 31 of the first case 30, the protrusions 62 a to 62 d are formed as shown in FIG. The seal space S is sealed by being elastically deformed and compressed so as to be crushed. In such a compressed state, a space in which each of the protrusions 62a to 62d can be elastically deformed in the width direction (the direction along the outer surface of the center portion) by the pressing is secured. Therefore, even if the compression rate is increased, the seal space S The filling rate of the seal member 60 is reduced.

  Similarly, the seal member 60 is disposed in the groove portion 24 of the main case 20 with respect to the second accommodation space 22. In this state, when the second case 40 and the main case 20 are assembled, the protrusions 62a to 62d are elastically deformed and compressed so as to be crushed according to the pressing force from the facing portion 41 of the second case 40. As a result, the seal space S is sealed.

  In such a sealed state, for example, as illustrated in FIG. 4B, even when an external pressure P such as a water pressure acts on the seal space S from the outside, the external pressure P is partially projected (see FIG. In the example of B), the protrusions 62d and 62a) act in a direction in which the protrusions 62d and 62a) are pressed against the groove 23 (24) and the facing portion 31 (41). In this way, the protrusion is pressed against the groove 23 (24) and the facing portion 31 (41), so that the entry into the first accommodation space 21 (second accommodation space 22) is inhibited, and the sealing by the seal member 60 is performed. Will be improved.

  As described above, in the mobile terminal 10 according to the present embodiment, the main case 20 has an annular shape so as to surround the first accommodation space 21 and the second accommodation space 22 in which objects are accommodated when assembled. Grooves 23 and 24 are formed, and the first case 30 and the second case 40 are respectively formed with opposing parts 31 and 41 that face the groove parts 23 and 24 when assembled. And in the groove parts 23 and 24, the cyclic | annular seal member 60 which seals the seal space S at the time of an assembly | attachment is each arrange | positioned, and this seal member 60 has the shape of the cross section orthogonal to the direction along the groove parts 23 and 24, It is formed to include a central portion 61 and a plurality of projecting portions 62 a to 62 d that protrude outward from the central portion 61.

  As a result, when the main case 20 is assembled with the first case 30 and the second case 40, the protrusions 62 a to 62 d of the seal member 60 are crushed by the pressing of the groove 23 and the facing portion 31 with respect to the first accommodation space 21. The second receiving space 22 is elastically deformed and compressed so that the protrusions 62a to 62d are crushed by the pressing of the groove 24 and the facing portion 41 with respect to the second housing space 22. On the other hand, the space which can elastically deform each protrusion part 62a-62d by the said press in the width direction (direction along the outer surface of the center part 61) is ensured. For this reason, even if the said compression rate is raised, the filling rate in the seal space S is reduced compared with the case where it contacts a groove part and an opposing part in most outer surfaces like an O-ring. Therefore, the filling rate can be reduced while increasing the compression rate of the seal member 60 that seals the seal space S.

  Moreover, since the sealing member 60 is formed so that the cross-sectional shape perpendicular to the direction along the groove portions 23 and 24 includes the central portion 61 and the plurality of protruding portions 62a to 62d over the entire circumference, the sealing member 60 is provided. The filling rate can be reduced while increasing the compression rate over the entire circumference.

  The seal member 60 is not limited to be formed so that the cross-sectional shape orthogonal to the direction along the groove portions 23 and 24 includes the central portion 61 and the plurality of protrusions 62a to 62d over the entire circumference. Depending on the environment or the like used, it may be formed so as to include a central portion 61 and a plurality of protrusions 62a to 62d in a part of the entire circumference.

  Further, the seal member 60 is formed so that the shape of the cross section orthogonal to the direction along the groove portions 23 and 24 is such that the four protrusion portions 62a to 62d are arranged at equal intervals with respect to the central portion 61 and protrude outward. Is done. Thereby, since the seal member 60 is formed in an X-shaped cross section, the seal member 60 has a shape that is difficult to twist with respect to torsion at the time of assembly, and the assemblability can be improved. In particular, since the four protrusions 62a to 62d are arranged at equal intervals, even when an external pressure P such as water pressure acts on the seal space S from the outside, the external pressure P presses the protrusion against the groove or the opposed part. Therefore, high sealing performance can be maintained even at a low compression rate. Thereby, the design margin with respect to the compression rate of the seal member 60 can be easily secured, and a seal structure that is strong against deformation due to external force such as expansion / contraction due to a temperature change, dropping, or secular change can be obtained.

  The seal member 60 is not limited to the four protrusions 62 a to 62 d arranged at equal intervals with respect to the central portion 61 and is formed so as to protrude outward, and includes two or three protrusions. It may be formed so that five or more protrusions may be provided. For example, like the seal member 60a shown in FIG. 5A, the two protrusions 62e and 62f may be formed so as to protrude in the opposite direction with respect to the central portion 61.

  Even in this case, for example, in the first accommodation space 21 in which the main case 20 and the first case 30 are assembled, as shown in FIG. 5B, each protrusion 62e is pressed by the groove 23 and the facing portion 31. , 62f are elastically deformed and compressed so as to be crushed. On the other hand, the space which can elastically deform each protrusion part 62e, 62f in the width direction (direction along the outer surface of the center part 61) by the said press is ensured. For this reason, even if the said compression rate is raised, the filling rate in the seal space S is reduced compared with the case where it contacts a groove part and an opposing part in most outer surfaces like an O-ring. Therefore, the filling rate can be reduced while increasing the compression rate of the seal member that seals the seal space S.

In addition, this invention is not limited to the said embodiment etc., For example, you may actualize as follows.
(1) The seal structure using the seal members 60 and 60a according to the present invention is not limited to being adopted in the portable terminal 10 having both the functions of the above-described wireless tag reader / writer and information code reader. You may employ | adopt for the portable terminal which has any one function of a tag reader / writer and an information code reader, and may be employ | adopted for terminal devices, such as a portable terminal which has another function, and a stationary terminal.

(2) The facing portion for configuring the seal space S is not limited to being formed in a planar shape like the facing portions 31 and 41 described above, and is formed in, for example, a step shape in accordance with the shape of the groove portion. May be.

(3) The groove portion for forming the seal space S is not limited to being formed in the main case 20 like the groove portions 23 and 24 described above, but may be formed in the first case 30 or the second case 40. . In this case, an opposing portion can be provided in the main case 20 so as to constitute the seal space S according to the groove formed in the first case 30 or the second case 40.

(4) The groove portions 23 and 24 and the facing portions 31 and 41 constituting the seal space S sealed by the seal members 60 and 60a according to the present invention are the groove portions constituting the seal space sealed by the conventional O-ring and The shape is the same as the facing portion. For this reason, with respect to the conventional terminal device which utilized the O-ring, only by switching the O-ring to the sealing members 60 and 60a according to the present invention, the filling rate is reduced while increasing the compression rate of the sealing member described above. There is an effect.

10: Mobile terminal (terminal device)
11 ... Case 20 ... Main case (one case)
21 ... 1st accommodation space 22 ... 2nd accommodation space 23, 24 ... Groove part 30 ... 1st case (other case)
31 ... Opposite part 40 ... Second case (the other case)
41 ... Opposite part 60, 60a ... Seal member 61 ... Central part 62a-62f ... Projection part S ... Seal space

Claims (3)

A terminal device configured with a case that protects an object to be accommodated by assembling one case and the other case,
In the one case, an annular groove is formed so as to surround the object to be contained at the time of assembly,
The other case is formed with a facing portion that faces the groove when assembled.
An annular seal member that seals a seal space formed by the groove portion and the facing portion by being pressed by the facing portion during assembly is disposed in the groove portion,
The sealing member is formed so that a cross-sectional shape perpendicular to the direction along the groove includes a central portion and a plurality of protruding portions protruding outward from the central portion at least at a part of the entire circumference. A terminal device characterized by that.   The said sealing member is formed so that the shape of the cross section orthogonal to the direction along the said groove part may be provided with the said center part and these several protrusion part over a perimeter. Terminal device.   The seal member has a cross-sectional shape perpendicular to the direction along the groove, and is formed such that the four protrusions are arranged at equal intervals with respect to the central portion and protrude outward. The terminal device according to claim 1 or 2.

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