JP5929025B2 - Portable machine - Google Patents

Description

  The present invention relates to a portable device used in an electronic key system.

  2. Description of the Related Art A portable device used for an electronic key system that locks and unlocks a door of a vehicle, starts an engine and a hybrid system without using a mechanical key is known. In such a portable device, as disclosed in Patent Document 1, a circuit board provided with an antenna element is arranged inside a case body constituted by an upper cover and a lower cover.

  Further, in such a portable device, it is necessary to prevent the circuit element from being inadvertently destroyed when the user touches the circuit element, or to prevent the circuit from being intentionally modified by the user. On the other hand, in Patent Document 1, the inner cover and the battery holder cannot be integrated and easily opened by heat caulking while the circuit board is sandwiched between the resin inner cover and the battery holder. Thus, it is disclosed that the above requirement is satisfied.

JP 2009-215739 A

  However, as in the portable device disclosed in Patent Document 1, the upper member and the lower member of the circuit board are integrated by heat caulking to form a structure that protects the circuit element. There was a problem that the number of processing steps when assembling the machine increased and labor was increased. Specifically, as compared with the case where the upper member and the lower member of the circuit board are integrated by fitting, the number of processing steps is increased by the amount of heat caulking after the fitting, which increases labor.

  In addition, it may be possible to integrate the upper and lower members of the circuit board using special screws, but in this case as well, the number of processing steps increases as the special screws are tightened, which increases labor.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to make it possible to more easily prevent circuit elements from being modified in a portable device used in an electronic key system. .

In the portable device according to claim 1, the first plate-like member is configured to include a plate-like flat portion and a plurality of engaging protrusions provided in the vicinity of the outer edge of the flat portion in the circumferential direction . The protrusion is separated from the nail-shaped protrusion so as to cover the nail-shaped protrusion having a claw-shaped top and the outer surface from the base to the top of the nail-shaped protrusion. The claw-shaped projections and the wall-shaped projections protrude from the surface facing the circuit board in the plane part to the circuit board side. Is provided. In addition, the second plate-like member has a top portion of the nail-shaped projecting portion outside the flat portion at a position facing the nail-shaped projecting portion of the first plate-like member when the second plate-like member is stacked on the circuit board together with the first plate-like member. It has an engagement receiving part engaged from the edge side. The claw-shaped protrusion of the first plate member is engaged with the engagement receiving portion of the second plate member, and the circuit board is sandwiched between the first plate member and the second plate member. ing.

  According to this, the wall-shaped projection part is arranged with a space on the outer edge side of the claw-shaped projection part so as to cover the outer edge of the planar part adjacent from the base part to the top part of the claw-shaped projection part. Therefore, in a state where the claw-shaped protrusion of the first plate-shaped member is engaged with the engagement receiving portion of the second plate-shaped member from the outer edge side of the flat surface portion, the claw-shaped protrusion on the outer edge side from the base portion to the top portion Is covered with the wall-shaped protrusion. If the base-to-top portion of the claw-shaped protrusion is covered with the wall-shaped protrusion on the outer edge side of the flat portion, it is difficult to apply a force to the top of the claw-shaped protrusion with a tool or the like. Therefore, it becomes difficult to release the engagement state between the first plate-like member and the second plate-like member by causing the top portion of the claw-shaped projection portion to warp to the outer edge side of the plane portion with a tool or the like. Accordingly, it is possible to prevent the circuit element of the circuit board sandwiched between the first plate member and the second plate member from being modified.

  Further, according to the configuration of the first aspect, the circuit element can be prevented from being modified as described above only by engaging the claw-shaped protrusion of the first plate member and the engagement receiving portion of the second plate member. Since it becomes possible, there is no need to prevent modification of circuit elements by heat caulking or fixing with special screws. Therefore, the processing man-hours such as heat caulking and fixing with special screws can be suppressed, and labor can be reduced. As a result, in the portable device used in the electronic key system, it is possible to more easily prevent the circuit element from being modified.

In the structure of Claim 2, the width direction length of a wall-shaped projection part is longer than the width direction length of a nail | claw-shaped projection part, and the wall-shaped projection part has covered the whole width direction of the claw-shaped projection part. In the structure of Claim 3, the range which can bend a nail | claw-shaped projection part by the wall-shaped projection part is restrict | limited to the range until a nail | claw-shaped projection part contacts a wall-shaped projection part.
According to a fourth aspect of the present invention, the second plate-shaped member has an engagement receiving portion, and when the claw-shaped protrusion engages with the engagement receiving portion, the claw-shaped protrusion has a claw shape. It will have a hole that fits at least in the top. According to this, on the outer edge side, the top of the nail-shaped protrusion is covered and hidden by the wall-shaped protrusion, and the top of the nail-shaped protrusion is buried in the hole. It becomes very difficult to apply force. Therefore, it becomes more difficult to disengage the engagement state between the first plate-like member and the second plate-like member by causing the top of the claw-shaped protrusion to bend toward the outer edge side of the flat portion with a tool or the like. Therefore, the modification of the circuit element can be made more difficult.

When as claim 4 is as claimed in claim 5, when a state in which the circuit board sandwiched with the first plate member and second plate member, of the wall-shaped projections It is preferable that both side surfaces of the claw-shaped protrusions located on the inner side are covered with at least one of the circuit board and the second plate member. According to this, when the first plate-shaped member and the second plate-shaped member are in the engaged state, the claw-shaped protrusion is covered on the outer edge side by the wall-shaped protrusion, or is covered by the hole at the lower part. In addition to being broken, both sides are covered by the circuit board and the second plate member. Therefore, according to the structure of Claim 3, since it becomes difficult to visually recognize a nail | claw-shaped projection part from the outside, the 1st plate-shaped member and the 2nd plate-shaped member are engaged by what kind of structure from the outside. It becomes difficult to know. In addition, since it becomes difficult to know the structure by which the first plate member and the second plate member are engaged, the relationship between the first plate member and the second plate member is determined. It becomes more difficult to solve the combined state. As a result, the modification of the circuit element can be made very difficult.

1 is an example of an exploded perspective view of a smart key 1. FIG. It is an external appearance perspective view for demonstrating the protrusion part 62 for engagement. (A)-(c) is the perspective view which showed the mode of the assembly | attachment of the protective cover 60, the circuit board 70, and the battery holder 80. FIG. (A)-(c) is a schematic diagram for demonstrating engagement with the engaging claw 62a of the protrusion part 62 for engagement, and the groove part 85a of the snap fitting claw part 85. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a smart key system (registered trademark) is taken as an example of an electronic key system, and a case where the present invention is applied to a smart key used as a portable device of the smart key system will be described.

For example, if the smart key system is installed in a vehicle and the user has a smart key, the door can be locked / unlocked and the engine or hybrid system can be started without using a mechanical key. It is a system that can.

  FIG. 1 is an example of an exploded perspective view of a smart key 1 of the present embodiment. The smart key 1 includes a portable device main body and an emergency key 3 accommodated in the portable device main body. The main body of the portable device functions as an electronic key, and includes an upper case 10, a lower case 20, a release hook 30, and the like. The external shape of the portable device body is composed of an upper case 10, a lower case 20, and a release hook 30, and the smart key 1 is formed by inserting the emergency key 3 into the portable device body.

  The upper case 10 and the lower case 20 are formed by dividing a thin rectangular parallelepiped into two parts, each of which is a container, and each corner of the container is rounded. . The release hook 30 is arranged on one side surface corresponding to the long side of the rectangular parallelepiped, and the emergency key 3 is arranged inside each case 10 and 20 along the one side surface. Key 1 is configured. Note that the upper case 10 and the lower case 20 correspond to the case constituting the outer shape of the portable device main body.

  Specifically, as shown in FIG. 1, a knob is provided from the upper case 10 to the lower case 20 in an internal space formed by the upper case 10 and the lower case that form the outer shape of the portable device body. The member 40, the waterproof cover 50, the protective cover 60, the circuit board 70, the battery holder 80, the cushion sheet 90, and the battery 95 are arranged in this order. In FIG. 1, circuit elements formed on the circuit board 70 are omitted.

  The knob member 40 has a push button type knob 41 for locking and unlocking a door in the vehicle. Each knob 41 is exposed to the surface of the upper case 10 from the opening 11 provided in the upper case 10 and is operated by the user.

  The waterproof cover 50 sandwiches the knob member 40 together with the upper case 10 and is integrated with the upper case 10 so that water and foreign matter entering from the opening 11 of the upper case 10 do not enter the lower case 20 side. . As such a waterproof cover 50, a material such as rubber that hardly absorbs moisture and has elasticity is adopted. Accordingly, the waterproof cover 50 is elastically deformed when the knob 41 is pressed, and returns to its original shape when the user removes the finger from the knob 41.

  The protective cover 60 has a plate shape that covers one side of the circuit board 70, that is, the upper surface. As such a protective cover 60, for example, a resin such as polycarbonate is employed. The protective cover 60 corresponds to the first plate member in the claims.

  The circuit board 70 includes a communication circuit that performs wireless communication with the outside. The circuit board 70 includes a push switch 71 on the upper surface of the circuit board 70 and an antenna element 72 on the other surface side of the circuit board 70, that is, the lower surface. Yes. Each switch 71 is disposed on the upper surface of the circuit board 70 at a location facing each knob 41 of the knob member 40 via the waterproof cover 50. Each switch 71 is pushed as each knob 41 is operated and the waterproof cover 50 is elastically deformed. The antenna element 72 transmits radio waves to the outside. The circuit element such as the antenna element 72 corresponds to the element recited in the claims.

  When the user approaches the vehicle with the smart key 1 and enters the sensing area of the smart key system, the communication circuit receives an ID request signal from the vehicle side and automatically generates an ID code signal in response thereto. Output. As a result, ID authentication is performed on the vehicle side, and if they match, the system shifts to a door lock / unlock signal waiting state, and lock / unlock is executed by obtaining a lock / unlock signal in that state. .

  The battery holder 80 has a plate shape, covers the lower surface of the circuit board 70, and holds the battery 95. As such a battery holder 80, resin, such as a polycarbonate, is employ | adopted, for example. In the present embodiment, the battery holder 80 has substantially the same planar size as the circuit board 70. The battery holder 80 corresponds to the second plate-like member in the claims.

  The cushion sheet 90 is disposed between the antenna element 72 mounted on the lower surface of the circuit board 70 and the lower case 20, and reduces the impact on the relatively heavy antenna element 72.

  The lower case 20 is provided with a protrusion 21 having functions of supporting and positioning the battery holder 80. Further, the lower case 20 and the upper case 10 are provided with a storage space for the emergency key 3, a space where the release hook 30 is disposed, and the like. The protrusion 21 may also be provided on the upper case 10. An ornament 100 is attached to the lower case 20.

  The release hook 30 is a mechanical button for allowing the emergency key 3 to be taken out from the portable device body when pressed to the portable device body side. Further, the emergency key 3 has a head portion 3a and a key portion 3b. The head portion 3a is a portion exposed from the portable device main body, and the emergency key 3 is detached from the portable device main body when the user picks the head portion 3a. And the key part 3b is accommodated in the storage space comprised by the upper case 10 and the lower case 20 being assembled | attached. The above is the overall configuration of the smart key 1 according to the present embodiment.

  Next, the assembly structure of the protective cover 60, the circuit board 70, and the battery holder 80 will be described. First, each structure of the protective cover 60, the circuit board 70, and the battery holder 80 will be described.

  As shown in FIG. 1, the protective cover 60 is composed of a plate-like flat surface portion 61, an engaging projection portion 62, and a snap fit claw portion 63. A window portion 64 is provided in the plane portion 61 at a location facing each switch 71. Therefore, when the flat surface portion 61 of the protective cover 60 is overlaid on the upper surface of the circuit board 70, each switch 71 is inserted into each window portion 64, and each switch 71 protrudes from the protective cover 60. That is, the flat portion 61 has a thickness smaller than the height value of the switch 71.

  A plurality of engaging protrusions 62 are provided near the outer edge of the flat surface portion 61. Each engaging protrusion 62 is a part used when the protective cover 60 and the battery holder 80 are integrated. Further, each of the engaging protrusions 62 is provided on the side surface of the flat surface portion 61 so as to protrude toward the circuit board 70 rather than the surface of the flat surface portion 61 opposite to the surface facing the circuit board 70.

  Here, the details of the engaging protrusion 62 will be described with reference to FIG. FIG. 2 is an external perspective view for explaining the engaging protrusion 62. As shown in FIG. 2, the engaging protrusion 62 includes an engaging claw 62 a and a protective plate 62 b, and is provided so as to protrude from the surface facing the circuit board 70 toward the circuit board 70.

  As shown in FIG. 2, the engaging claw 62 a has a claw-shaped (hook-like) top, and the claw-shaped protrusion protrudes inward from the outer edge side of the flat portion 61. To do. In other words, a protrusion is provided that protrudes from the shaft-shaped main body of the engaging claw 62a in a direction crossing the shaft. Further, the engaging claw 62a has elasticity so as to bend in a direction intersecting with the axis of the main body of the engaging claw 62a in the unloaded state, and as shown in FIG. It is assumed that an inclination is provided from the apex to the apex of the claw-shaped protrusion. Hereinafter, this inclination of the engaging claw 62a is referred to as an inclined portion at the tip. The engaging claw 62a corresponds to a claw-shaped protrusion in the claims.

  As shown in FIG. 2, the protection plate 62b covers at least the engagement claw 62a from the base to the top along the outer edge of the planar portion 61 where the engagement claw 62a is adjacent. Rather than the outer edge side (with a space). That is, the protection plate 62b is provided so as to cover at least the base to the top in the height direction of the engaging claw 62a and to cover at least the entire width direction in the width direction of the engaging claw 62a. The protective plate 62b corresponds to the wall-shaped protrusion in the claims.

  For example, as the protective plate 62b, the engaging projection 62 disposed on the outer edge other than the corner of the flat portion 61 may have a flat plate shape as shown in FIG. In addition, the engaging protrusion 62 disposed at the corner of the flat surface portion 61 is configured to use a folding screen-like shape covering and enclosing the engaging claw 62a in the shape of “<” along the shape of the corner. That's fine. In the present embodiment, for example, four engaging protrusions 62 are provided on the protective cover 60.

  In the present embodiment, the case where the flat surface portion 61 of the protective cover 60 is rectangular has been described as an example, but the outer edge is not a straight line but a curve as in the case where the flat surface portion 61 of the protective cover 60 is, for example, elliptical. In this case, the protective plate 62b may be shaped along the curve.

  The snap-fit claw portion 63 is the same as a hook used for a well-known hook-type snap fit. Here, the hook-type snap fit means that the hook provided on one part is mechanically held by hooking it on the other part on the receiving side using the elasticity of the hook-provided location or the hook itself. The fixed method is shown. A plurality of snap fit claws 63 are provided in the vicinity of the outer edge of the flat portion 61, and, similar to the engaging protrusion 62, the circuit board is located on the opposite side of the surface of the flat portion 61 that faces the circuit board 70. It is provided so as to protrude to the 70 side. Each snap-fit claw portion 63 may be used when the protective cover 60 and the battery holder 80 are integrated, or may be used when the protective cover 60 and the circuit board 70 are integrated. In the present embodiment, for example, two snap fit claws 63 are provided in the protective cover 60, and the case where the protective cover 60 and the circuit board 70 are integrated will be described as an example.

  The engaging protrusions 62 and the snap fit claws 63 do not obstruct the circuit wiring on the circuit board 70 when the flat surface 61 of the protective cover 60 is superimposed on the upper surface of the circuit board 70. In addition, it may be configured to be provided in the vicinity of the outer edge of the planar portion 61, and may be configured to be disposed on the side surface of the planar portion 61.

  In the circuit board 70, the engaging protrusion 62 and the snap fit claw 63 provided in the protective cover 60 and the snap fit claw 85 provided in the battery holder 80 among the outer edges of the circuit board 70 are opposed. Notch portions 73 are provided at locations that do not affect circuit wiring or the like. As a result, the engaging protrusions 62 and the snap fit claws 63 of the protective cover 60 are inserted into the notches 73, so that the flat portion 61 of the protective cover 60 is superimposed on the upper surface of the circuit board 70. In addition, each snap fit claw portion 85 of the battery holder 80 is inserted into each cutout portion 73 so that the upper surface of the battery holder 80 is superimposed on the lower surface of the circuit board 70. It has become. Here, it is assumed that the engaging protrusion 62 is provided so that the protective plate 62b does not protrude at least entirely from the notch 73 of the circuit board 70 in the thickness direction of the protective plate 62b.

  The battery holder 80 has a plate shape, and has a concave portion 81 on one surface (referred to as an upper surface) facing the lower surface of the circuit board 70 of the plate. In the circuit board 70, circuit elements and mounting components installed on the lower surface are exposed from the surface of the circuit board 70. For this reason, when the battery holder 80 is overlapped with the circuit board 70, the recess 81 is a part that forms a space for storing circuit elements and the like provided on the lower surface of the circuit board 70.

  Further, on the other surface side (lower surface) of the battery holder 80, a storage portion 82 for disposing the battery 95, and a window portion 83 for disposing a cushion sheet 90 for reducing the impact on the antenna element 72 of the circuit board 70, Is provided.

  In addition, on the outer edge portion of the battery holder 80, the engaging protrusions 62 and the snap fit claws 63 are provided at positions facing the engaging protrusions 62 and the snap fit claws 63 of the protective cover 60. A plurality of holes 84 are provided (see FIG. 4A). The hole 84 is not penetrating and has a concave shape. Further, it is assumed that a snap-fit claw portion 85 is provided at a position adjacent to the inner side with respect to the outer edge side of the plate-like surface of the battery holder 80 when viewed from the hole portion 84 facing the engaging protrusion 62 ( (See FIG. 4 (a)).

  When the protective cover 60 and the battery holder 80 are assembled, the snap-fitting claw portion 85 is positioned on the direction side where the claw-shaped projections of the engaging claw 62a of the engaging projection 62 of the protective cover 60 are present. Is provided. The snap-fit claw portion 85 is the same as a hook used for a well-known hook-type snap-fit, and is provided so as to protrude toward the circuit board 70 side. The snap-fit claw portion 85 is used when the battery holder 80 and the circuit board 70 are integrated. Further, when the protective cover 60 and the battery holder 80 are assembled, the snap-fit claw portion 85 is engaged at a position facing the claw-shaped protrusion of the engaging claw 62a of the engaging protrusion 62 of the protective cover 60. A combined groove 85a is provided (see FIG. 4A). In addition, this groove part 85a is equivalent to the engagement receiving part of a claim.

  Subsequently, the assembly of the protective cover 60, the circuit board 70, and the battery holder 80 will be described in detail with reference to FIGS. 3 (a) to 3 (c). 3A to 3C are perspective views showing how the protective cover 60, the circuit board 70, and the battery holder 80 are assembled.

  First, the circuit board 70 is disposed between the protective cover 60 and the battery holder 80 (see FIG. 3A). Then, the snap fit claw portions 85 of the battery holder 80 are inserted into the respective cutout portions 73 of the circuit board 70, and the claw of the snap fit claw portion 85 is caught by the cutout portions 73, so that the circuit board 70 is connected to the battery holder 80. (See FIG. 3B).

  Thereafter, the engaging protrusion 62 and the snap-fit claw 63 of the protective cover 60 are inserted into the notches 73 of the circuit board 70. Thereby, the nail | claw of the snap fit nail | claw part 63 is hooked on the notch part 73, and the circuit board 70 is mechanically hold | maintained at the protective cover 60. FIG. Further, the engaging claw 62a of the engaging protrusion 62 engages with the groove 85a of the snap fit claw 85 of the battery holder 80, so that the protective cover 60 and the battery holder 80 are integrated (see FIG. 3C). ). As a result, the circuit board 70 is sandwiched between the protective cover 60 and the battery holder 80, and a package in which the protective cover 60, the circuit board 70, and the battery holder 80 are integrated is manufactured.

  Here, with reference to FIG. 4A to FIG. 4C, the engagement between the engaging claw 62 a of the engaging projection 62 and the groove 85 a of the snap fit claw 85 will be described in detail. 4A to 4C are schematic views for explaining the engagement between the engaging claw 62a of the engaging projection 62 and the groove 85a of the snap fit claw 85. FIG.

  When the engaging claw 62a of the engaging projection 62 is engaged with the groove 85a of the snap fitting claw 85, first, the inclined portion at the tip of the engaging claw 62a is brought close to contact with the top of the snap fitting claw 85. (See FIG. 4 (a)). Since the engaging claw 62a has elasticity after coming into contact with the top, the inclined portion warps toward the protective plate 62b while sliding on the top of the snap fit portion 85.

  Thereafter, when the claw-shaped protrusion of the engaging claw 62a reaches the groove 85a of the snap-fitting claw 85, the claw-shaped protrusion of the engaging claw 62a is engaged with the groove 85a by the elastic force of the engaging claw 62a. (See FIG. 4B). That is, the engaging claw 62a is elastically engaged with the groove 85a.

  When the engaging claw 62a is further pushed into the battery holder 80 side, the engaging claw 62a is accommodated in the hole 84 of the battery holder 80 (see FIG. 4C). In this state, the engaging claw 62a is covered with the protection plate 62b and the hole 84, so that it cannot be seen from the outside.

  When the engaging claw 62a and the groove 85a are engaged, the claw-shaped protrusion of the engaging claw 62a engages with the engaging surface of the groove 85a, so that the protective cover 60 moves away from the battery holder 80. Is blocked. Further, the main body of the engaging claw 62a has the elasticity as described above, so that it can be bent in a direction intersecting the axis of the main body in an unloaded state. However, the range in which the engagement claw 62a can be deflected by the protection plate 62b that is spaced apart from the engagement claw 62a is limited to the range until the engagement claw 62a contacts the protection plate 62b. Shall.

  Here, the case where the groove portion 85 is provided as the engagement receiving portion of the engagement claw 62a in the snap fit claw portion 85 of the battery holder 80 has been described as an example, but the present invention is not necessarily limited thereto. For example, it is good also as a structure which provides the engagement receiving part of the engagement nail | claw 62a in the location on the battery holder 80 different from the snap fit nail | claw part 85. FIG. Also in this case, it is assumed that the engaging claw 62a is elastically engaged with the engaging receiving portion provided on the battery holder 80 from the outer edge side of the flat surface portion 61.

  After the protective cover 60, the circuit board 70, and the battery holder 80 are integrated, the circuit board 70 is sandwiched between the protective cover 60 and the battery holder 80, and the engaging protrusions 62 and the snap fit claws are formed in the notch 73. 63 and each snap-fit claw portion 85 are inserted to restrict the movement of the circuit board 70. Each switch 71 of the circuit board 70 is disposed in each window portion 64 of the protective cover 60, and the antenna element 72, the circuit element, and the like of the circuit board 70 are accommodated in the recess 81 of the battery holder 80. For this reason, the problem that the circuit board 70 is detached from the protective cover 60 and the battery holder 80 due to movement in the surface direction of the circuit board 70 does not occur.

  As described above, in this embodiment, the protective plate has a space on the outer edge side of the engaging claw 62a so as to cover the outer edge of the flat surface portion 61 close to the top of the engaging claw 62a. Since 62b is arranged, in a state where the protective cover 60, the circuit board 70, and the battery holder 80 are integrated, at least the top of the engaging claw 62a is covered with the protective plate 62b on the outer edge side. If at least the top of the engaging claw 62a is covered with the protective plate 62b on the outer edge side of the flat surface portion 61, it is difficult to apply a force to the top of the engaging claw 62a with a tool such as a flat-blade screwdriver. Therefore, the top portion of the engaging claw 62a is warped toward the outer edge side of the flat surface portion 61 with a tool or the like to release the engagement state between the engaging claw 62a that is elastically engaged and the groove portion 85a of the snap fit claw portion 85. Becomes difficult.

  In the present embodiment, the top of the engaging claw 62a is housed and buried in the hole 84 that does not pass through the battery holder 80. Therefore, it is very difficult to apply a force to the top of the engaging claw 62a with a tool or the like. become. Therefore, also from this point, the engagement claw 62a is elastically engaged with the groove 85a of the snap fit claw portion 85 by bending the top portion of the engagement claw 62a toward the outer edge side of the flat surface portion 61 with a tool or the like. It becomes difficult to solve the combined state.

  Further, in the present embodiment, after the protective cover 60, the circuit board 70, and the battery holder 80 are integrated, the engaging claws 62a cannot be seen from the outside. It becomes difficult to know whether the battery holder 80 is integrated. Accordingly, it becomes more difficult to release the engagement state between the engagement claw 62a and the groove 85a of the snap fit claw portion 85. Further, in a state where the engaging claw 62a cannot be visually observed from the outside, it is also impossible to apply a force to the top of the claw-shaped protrusion with a tool or the like. As a result, the modification of the circuit element can be made very difficult.

  Further, according to the configuration of the present embodiment, the circuit element can be prevented from being modified as described above only by engaging the engaging claw 62a of the protective cover 60 and the groove 85a of the snap fit claw 85 of the battery holder 80. Since it becomes possible, there is no need to prevent modification of circuit elements by heat caulking or fixing with special screws. Therefore, the processing man-hours such as heat caulking and fixing with special screws can be suppressed, and labor can be reduced. As a result, in the portable device used in the electronic key system, it is possible to more easily prevent the circuit element from being modified.

  In addition, the cost can be reduced to the extent that a device for performing heat caulking or tightening special screws is not required. Further, since it does not take time for heat caulking or tightening the special screw in addition to the time for engaging the protective cover 60 and the battery holder 80, the time cost can be reduced.

  In this embodiment, although the structure which provides the snap fit claw part 63 in the protective cover 60 was shown, it is not necessarily restricted to this, For example, it is good also as a structure which does not provide the snap fit claw part 63.

  In this embodiment, the case where the present invention is applied to a smart key used as a portable device of a smart key system has been described as an example. However, the present invention is not limited to this. The present invention can also be applied to a portable device of another electronic key system that controls a vehicle according to a result of code verification using wireless communication. For example, the present invention may be applied to a keyless transmitter used as a portable device of a keyless entry system that enables locking and unlocking of a door without using a mechanical key.

  In the present embodiment, the configuration in which the engaging projection 62 is provided on the protective cover 60 side and the engagement receiving portion of the engaging claw 62a and the hole 84 are provided on the battery holder 80 side is shown, but the present invention is not necessarily limited thereto. . For example, the engagement protrusion 62 may be provided on the battery holder 80 side, and the engagement receiving portion and the hole 84 of the engagement claw 62a may be provided on the protective cover 60 side. In this case, the battery holder 80 corresponds to the first plate member of the claims, and the protective cover 60 corresponds to the second plate member of the claims.

  In the present embodiment, the configuration in which the hole portion 84 of the battery holder 80 is not penetrated is shown, but the configuration is not necessarily limited thereto. For example, a through hole may be used as the hole 84 if the diameter and depth are such that the top of the engaging claw 62a cannot be touched with a tool such as a flat-blade screwdriver.

  In the present embodiment, the protection plate 62b is provided and the hole 84 of the battery holder 80 is also provided. However, the configuration is not necessarily limited thereto. For example, it is good also as a structure which provides only either one.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Smart key (mobile device), 10 Upper case (case which comprises the external shape of a portable device main body), 20 Lower case (case which comprises the external shape of a portable device main body), 60 Protective cover (1st plate-shaped member), 61 plane part, 62 projection part for engagement, 62a engagement claw (claw-shaped projection part), 62b protective plate (wall-like projection part), 63 snap fit claw part, 70 circuit board, 72 antenna element (element), 73 cut Notch part, 80 battery holder (second plate-like member), 84 hole part, 85 snap fit claw part, 85a groove (engagement receiving part)

Claims (5)

Used in an electronic key system that controls the vehicle according to the result of code verification using wireless communication,
A circuit board on which an element for performing wireless communication with the outside is mounted in a case constituting the outer shape of the mobile device body, a first plate-like member overlaid on one surface side of the circuit board, and the circuit board A portable device in which a second plate-like member stacked on the surface side is stored,
The first plate member is
A plate-like plane portion and a plurality of engaging projections provided in the vicinity of the outer edge of the plane portion in the circumferential direction are configured,
The engaging protrusion is separated from the nail-shaped protrusion so as to cover the nail-shaped protrusion having a claw-shaped top and the outer surface from the base to the top of the nail-shaped protrusion. It is arranged on the outer edge side of the planar portion with respect to the shape projection portion, and the length protruding from the planar portion is a wall-like projection portion longer than the claw-shaped projection portion ,
The claw-shaped protrusions and the wall-like protrusions are provided so as to protrude from the surface facing the circuit board to the circuit board side in the plane part,
The second plate member is
An engagement receiver in which the top portion of the claw-shaped projection portion engages from the outer edge side of the planar portion at a location facing the claw-shaped projection portion of the first plate-shaped member when the first plate-shaped member is overlaid on the circuit board. Have
The claw-shaped protrusion of the first plate member is engaged with the engagement receiving portion of the second plate member, and the circuit board is sandwiched between the first plate member and the second plate member. A portable device characterized by that. In claim 1,
  The length in the width direction of the wall-shaped protrusion is longer than the length in the width direction of the nail-shaped protrusion, and the wall-shaped protrusion covers the entire width direction of the nail-shaped protrusion. Machine. In claim 1 or 2,
The range in which the claw-shaped protrusion can be bent by the wall-shaped protrusion is limited to the range until the claw-shaped protrusion contacts the wall-shaped protrusion. . In any one of Claims 1-3 ,
The second plate-like member has the engagement receiving portion, and when the claw-shaped projection is engaged with the engagement receiving portion, a crest-shaped top portion of the claw-shaped projection is A portable device characterized by having at least a hole to be accommodated. In claim 4 ,
When the circuit board is sandwiched between the first plate-like member and the second plate-like member, both side surfaces of the claw-shaped projections located inside the wall-like projection are A portable device that is covered with at least one of a circuit board and the second plate-like member.

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