JP2012060489A - Portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal which improves static electricity resistance with simple structure.SOLUTION: In an optical information reading device, power reception terminals 26 and 27, which contact with feeding terminals of a charger and thereby starting the charging, are exposed to the exterior of a housing 21. This optical information reading device includes conductive buffer members 28 and 29, covering and protecting part of the housing 21 in which a circuit board 30 is housed. The buffer members 28 and 29 are constantly connected with ground patterns 31 and 32 of the circuit board 30.

Description

  The present invention relates to a portable terminal whose connection terminal is exposed to the outside.

  Conventionally, when operating a mobile device, static electricity is applied to the human body or contact with other devices (for example, communication, charging, etc.) without the operator being aware of it, causing the mobile device to malfunction or fail. Sometimes. Although it is effective to improve resistance to static electricity as a portable device, there are limitations due to other characteristics (for example, the size of the device and cost effectiveness), and the effect is limited. Moreover, since the static electricity itself generated as described above depends on the environment in which the portable device is used, it cannot always be controlled (suppressed).

  Therefore, a portable terminal device shown in Patent Document 1 below is known as a technique related to countermeasures against static electricity in the portable terminal. In this portable terminal device, a conductive member is attached to the periphery of the imaging window in which the camera unit is disposed, and the conductive member and a part of the central opposing body having conductivity are in the first case member. It is in contact with and energized. Then, a part of the central opposing body comes into surface contact with a part of the central supporting body, so that the conductive member, a part of the central opposing body, and a part of the central supporting body are in a conductive state. For this reason, when the conductive member is touched with a finger, the charged static electricity is grounded to the reference potential line without flying to the camera.

JP 2007-5914 A

  By the way, in the portable terminal whose connection terminal is exposed to the outside, there is a problem that static electricity is likely to be applied to a circuit board or the like inside the housing via the connection terminal. In the configuration shown in Patent Document 1, it is difficult to suppress the application of static electricity through the exposed connection terminal, and the mobile device is likely to malfunction or fail.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a mobile terminal capable of improving resistance to static electricity with a simple configuration.

  In order to achieve the above object, in the portable terminal according to claim 1, the connection terminal for electrically connecting the external device and the circuit board accommodated in the casing is exposed outside the casing. The portable terminal includes a conductive buffer member that covers and protects a part of the housing, and the buffer member is always connected to a ground pattern of the circuit board.

  According to a second aspect of the present invention, in the portable terminal according to the first aspect, the buffer member contacts a conductive discharge portion provided in the external device prior to the connection when the connection is made via the connection terminal. It is formed so that it may do.

  According to a third aspect of the present invention, in the portable terminal according to the first or second aspect, the buffer member is disposed in the vicinity of the connection terminal.

  According to a fourth aspect of the present invention, in the mobile terminal according to the first or second aspect, the buffer member is disposed in a grip portion where the casing is gripped.

  According to a fifth aspect of the present invention, in the mobile terminal according to any one of the first to fourth aspects, the buffer member is always connected to the ground pattern by being constantly pressed against the ground pattern. It is characterized by.

  A sixth aspect of the present invention is the portable terminal according to any one of the first to fifth aspects, wherein the buffer member is in contact with a conductive discharge portion provided so as to protrude outward in the external device. It is formed so that it may do.

  According to the first aspect of the present invention, a conductive buffer member that covers and protects a part of the casing in which the circuit board is accommodated is provided, and this buffer member is always connected to the ground pattern of the circuit board. .

The shock-absorbing member that protects the housing usually protects the housing from the impact such as dropping, and the contents accommodated in the housing. It is arranged at the site where it is easy to contact the floor surface first. Therefore, by adopting a conductive buffer member and always connecting the buffer member to the ground pattern of the circuit board, the buffer member can be attached to the external device or the like even when the casing is in contact with an external device or the like charged with static electricity. Will be contacted first. For this reason, the static electricity applied at the time of the contact flows to the ground pattern via the buffer member, so that the influence of static electricity via the connection terminal exposed to the outside is suppressed.
Therefore, resistance to static electricity can be improved with a simple configuration.

  In the invention of claim 2, the buffer member is formed so as to come into contact with a conductive discharge portion provided in the external device prior to this connection when connecting via the connection terminal. As a result, when the external device is electrically connected, the buffer member comes into contact with the conductive discharge part provided in the external device before this connection. Even if it exists, since this static electricity flows into a ground pattern via a discharge part and a buffer member, the influence of static electricity via the connection terminal exposed outside can be suppressed reliably.

  In the invention of claim 3, since the buffer member is arranged in the vicinity of the connection terminal, the buffer member is likely to come into contact with the external device or the like before the connection terminal, so that the external device is charged with static electricity. Even if it is a case, the influence of the static electricity through the connection terminal exposed outside can be suppressed more reliably.

  In the invention of claim 4, since the buffer member is disposed in the grip portion where the housing is gripped, it is easy for the user to touch the buffer member when gripping the grip portion. This static electricity will flow to the ground pattern through the buffer member even if it is a case, and the influence of the static electricity through the connection terminal exposed to the outside can be more reliably suppressed.

  In the invention of claim 5, the buffer member is always connected to the ground pattern by being constantly pressed against the ground pattern. By using the elastic force of the buffer member, the buffer member and the ground pattern are securely in close contact with each other, so that it is not necessary to connect the buffer member and the ground pattern via a connection member such as a connector or solder. In addition, a configuration that is easy to manufacture can be realized.

  In the invention of claim 6, the buffer member is formed so as to come into contact with a conductive discharge portion provided so as to protrude outward by an external device. As a result, the buffer member comes into contact with the discharge portion protruding outward before the connection terminal comes into contact with the external device or the like, so that the influence of static electricity through the connection terminal exposed to the outside is more affected. It can be surely suppressed.

It is a front view which shows the portable terminal and charging device which concern on this embodiment. It is a side view which shows the portable terminal and charging device of FIG. It is explanatory drawing for demonstrating the connection state of both buffer members and the ground pattern of a circuit board. FIG. 4 is a cross-sectional view schematically showing a cut surface corresponding to line 4-4 in FIG. 3. It is a block diagram which shows roughly the electrical connection state of both buffer members and the ground pattern of a circuit board. It is the top view which looked at the charging device of FIG. 1 from the upper surface. It is the rear view which looked at the charging device of FIG. 1 from the back. It is sectional drawing which looked at the charging device of FIG. 1 from the side. It is a top view which shows the circuit board by which an electric power feeding terminal is arrange | positioned. FIG. 10A is a side view showing a detailed shape of the positive power supply terminal, and FIG. 10B is a side view showing a state where the positive power supply terminal is installed on the circuit board. It is a front view which shows the optical information reader which concerns on the modification of this embodiment.

  Hereinafter, an embodiment in which a portable terminal of the present invention is applied to an optical information reader will be described with reference to the drawings. FIG. 1 is a front view showing an optical information reading device 20 and a charging device 10 according to the present embodiment. FIG. 2 is a side view showing the optical information reading device 20 and the charging device 10 of FIG.

  The optical information reader 20 according to the present embodiment functions as a portable code reader that is carried by a user and optically reads an information code such as a bar code or a two-dimensional code. The upper and lower cases 21a, 21b A circuit board 30 for constituting a code reader and various electrical components such as a light source, a lens, a light receiving sensor, and a storage device are accommodated in a housing 21 constituted by the above. The electrical configuration in the housing 21 can be the same as a known code reader (bar code reader, two-dimensional code reader, etc.).

  As shown in FIGS. 1 and 2, the casing 21 includes a gripping portion 22 that is gripped by a user, a liquid crystal portion 23 to which a liquid crystal display 23a is attached, and a head portion 24 in which a reading port 24a is provided. . When inputting information such as a function key capable of inputting information to be read and information related to operation of the optical information reading device 20 or a numeric keypad capable of inputting numeric information, in the vicinity of the liquid crystal display 23a of the grip portion 22. A key operation unit 25 having a plurality of keys to be operated is provided. As a result, the user grips the grip portion 22 in order to operate the key operation portion 25. A plate-like positive power receiving terminal 26 and a negative power receiving terminal 27 functioning for charging are provided on the rear end surface portion 22a of the grip portion 22 so as to be exposed. The head 24 is arranged so as to be separated from the gripping portion 22 by interposing a liquid crystal display 23 a between the head portion 24 and the gripping portion 22. The positive power receiving terminal 26 and the negative power receiving terminal 27 may correspond to an example of a “connection terminal” described in the claims.

  Further, in the corner of the casing 21 and in the vicinity of the power receiving terminals 26 and 27, two buffers for absorbing the external impact and protecting the casing 21 and the contents in the casing 21. Members 28 and 29 are provided. Both the buffer members 28 and 29 are made of conductive elastic members such as conductive rubber. The buffer member 28 is formed such that the outer surface portion 28 a exposed from the housing 21 covers the rear end surface portion 22 a and a part of the side surface of the grip portion 22. Further, the buffer member 29 is formed so that the outer surface portion 29 a exposed from the housing 21 covers a part of the rear end surface portion 22 a and other side surfaces of the grip portion 22. As described above, the buffer members 28 and 29 are arranged at the corners of the grip portion 22, so that they are placed on the desk surface, the floor surface, or the like rather than the other power receiving terminals 26 and 27, the key operation unit 25, or the like. The first contact is made, and the housing 21 and the like can be protected.

  FIG. 3 is an explanatory diagram for explaining a connection state between the buffer members 28 and 29 and the ground patterns 31 and 32 of the circuit board 30. 4 is a cross-sectional view schematically showing a cut surface corresponding to line 4-4 of FIG. FIG. 5 is a block diagram schematically showing an electrical connection state between the buffer members 28 and 29 and the ground patterns 31 and 32 of the circuit board 30. In addition, in FIG. 3, the state which abbreviate | omitted the upper case 21a is simplified for convenience.

  As shown in FIGS. 3 and 4, ground patterns 31 and 32 are provided on the outer edge of the lower surface of the circuit board 30 accommodated in the housing 21, and the buffer member 28 has a ground pattern 31 at its inner surface 28 b. The buffer member 29 is electrically connected to the ground pattern 32 at the inner surface 29b.

  Specifically, the inner surface portion 28b is held by being sandwiched between the upper and lower cases 21a and 21b constituting the housing 21, and the projecting end portion 28c is always pressed from below and elastically deformed when sandwiched. It is formed so as to contact the ground pattern 31 in a state. Similarly to the inner surface portion 28b, the inner surface portion 29b is held by being sandwiched between the upper and lower cases 21a and 21b constituting the housing 21, and the projecting end portion 29c is constantly pressed from below during this clamping. It is formed so as to be in contact with the ground pattern 32 in an elastically deformed state. In this way, by using the elastic force of the buffer members 28 and 29, the buffer members 28 and 29 and the ground patterns 31 and 32 are securely and closely connected without using a connection member such as a connector or solder. The Rukoto.

With reference to FIG. 5, a description will be given of the charge removal function of the buffer members 28 and 29 configured in this way and the ground patterns 31 and 32 of the circuit board 30.
As shown in FIG. 5, since the inner surface portion 28b and the ground pattern 31 are electrically connected, and the inner surface portion 29b and the ground pattern 32 are electrically connected, an electrostatically charged object is applied to the outer surface portion 28a. When contact is made, static electricity applied at the time of contact flows to the ground pattern 31 via the outer surface portion 28a. Further, even when an electrostatically charged object comes into contact with the outer surface portion 29a, the static electricity applied at the time of the contact flows to the ground pattern 32 through the outer surface portion 29a. As described above, the static electricity applied at the time of contact with both the buffer members 28 and 29 flows into the ground patterns 31 and 32 and is preferably neutralized, and is exposed to the outside of the housing 21. The positive power receiving terminal 26 and the negative power receiving terminal 27 to suppress the influence of the static electricity.

  FIG. 6 is a top view of the charging device 10 of FIG. 1 as viewed from above. FIG. 7 is a rear view of the charging device 10 of FIG. 1 as viewed from the back. FIG. 8 is a cross-sectional view of the charging device 10 of FIG. 1 as viewed from the side. FIG. 9 is a top view showing the circuit board 12 on which the power supply terminals 14 and 15 are arranged. FIG. 10A is a side view showing the detailed shape of the positive power supply terminal 14, and FIG. 10B is a side view showing a state where the positive power supply terminal 14 is installed on the circuit board 12. In FIG. 9, for the sake of convenience, the static elimination terminals 16 and 17 and the parts related to the static elimination terminals 16 and 17 are omitted.

Next, the charging device 10 will be described.
The charging device 10 shown in FIGS. 1 and 2 has a charging function for charging the optical information reading device 20, and a communication function that functions as a relay unit when the optical information reading device 20 communicates with another external device. have. As shown in FIGS. 6 to 8, the charging device 10 includes a circuit board 12 on which a control circuit that performs overall control is mounted in a housing 11 in order to realize a charging function and a communication function. Has been. Further, a connector 13 for communicating with an external device or the like is provided at the rear lower end portion of the housing 11, and this connector 13 is electrically connected to a predetermined portion of the circuit board 12 as shown in FIG. It is connected to the.

  In addition, the charging device 10 is provided with an accommodating portion 11 a for accommodating the holding portion 22 of the optical information reading device 20 while being held. The bottom of the housing portion 11a is a terminal for charging the optical information reading device 20 by contacting the positive power receiving terminal 26 and the negative power receiving terminal 27 of the optical information reading device 20 accommodated. A positive power supply terminal 14 and a negative power supply terminal 15 are provided.

Since both the power supply terminals 14 and 15 have the same configuration, the positive power supply terminal 14 will be described in detail below with reference to FIG. 10 as a representative example.
As shown in FIG. 10A, the positive power supply terminal 14 is formed by bending a metal wire, and forms one end portion 14a exposed in the accommodating portion 11a in a substantially inverted V shape and the other end. By forming the portion 14b in the shape of a coil spring, the portion 14b is configured to be elastically deformed in the pressing direction in accordance with the pressing from the one end portion 14a. As shown in FIGS. 8 and 10B, the positive-side power supply terminal 14 configured in this way is inserted into the housing portion 11a through an insertion hole in which a part of the one end portion 14a is formed in the housing portion 11a. The other end 14b is assembled to the circuit board 12 so as to protrude outward. Similarly, the negative power supply terminal 15 is formed by bending a metal wire, and has a substantially inverted V-shaped one end and a coil spring-shaped other end. The other end of the negative power feeding terminal 15 is assembled to the circuit board 12 so that a part of one end protrudes outward in the housing portion 11a through an insertion hole formed in the housing portion 11a. .

  As shown in FIG. 6, a pair of charge removal terminals 16 and 17 are provided on the bottom of the accommodating portion 11 a and outside the power supply terminals 14 and 15. These static elimination terminals 16 and 17 contact at least one of the charging device 10 and the optical information reader 20 by contacting the buffer members 28 and 29 of the optical information reader 20 accommodated in the accommodating portion 11a. It is configured to exhibit a charge eliminating function that eliminates a potential difference caused by static electricity.

  Both the static elimination terminals 16 and 17 are formed by bending a metal wire, similarly to the positive power supply terminal 14, and are formed to have a substantially inverted V-shaped one end and a coil spring-like other end. Has been. Both static elimination terminals 16 and 17 are assembled to the circuit board 12 at the other end so that a part of one end protrudes outward in the accommodating portion 11a through an insertion hole formed in the accommodating portion 11a. And is configured to elastically deform in the pressing direction in response to pressing from one end. In particular, the protruding height of the static elimination terminals 16 and 17 in the accommodating portion 11a is set to be higher than the protruding height of the power feeding terminals 14 and 15.

  When the optical information reading device 20 is accommodated in the accommodating portion 11a with respect to the charging device 10 configured as described above, both the buffer members 28 are disposed before the both power receiving terminals 26 and 27 come into contact with both the power feeding terminals 14 and 15. , 29 are in contact with both static elimination terminals 16, 17. For this reason, when the charging device 10 is charged with static electricity, the static electricity flows to the ground patterns 31 and 32 via the charge removal terminals 16 and 17 and the buffer members 28 and 29. Thereby, in the optical information reader 20, the influence of static electricity via the power receiving terminals 26 and 27 exposed to the outside can be reliably suppressed.

  Further, when the optical information reading device 20 is placed on a placement surface such as a desk surface or a floor surface, before the power receiving terminals 26 and 27 come close to (contact with) the placement surface, both the buffer members 28, 29 contacts the mounting surface. For this reason, when the mounting surface is charged with static electricity, the static electricity flows to the ground patterns 31 and 32 via the buffer members 28 and 29. Even in such a case, the optical information reader 20 can reliably suppress the influence of static electricity via the power receiving terminals 26 and 27 exposed to the outside.

  As described above, in the optical information reading device 20 according to the present embodiment, the conductive buffer members 28 and 29 that cover and protect a part of the casing 21 in which the circuit board 30 is housed are provided. These buffer members 28 and 29 are always connected to the ground patterns 31 and 32 of the circuit board 30.

Thereby, even when the casing 21 contacts the charging device 10 or other external device charged with static electricity, the buffer members 28 and 29 come into contact with the charging device 10 or the like first. For this reason, the static electricity applied at the time of contact flows to the ground patterns 31 and 32 via the buffer members 28 and 29, so that the influence of static electricity via the power receiving terminals 26 and 27 exposed to the outside is suppressed.
Therefore, resistance to static electricity can be improved with a simple configuration.

  Further, in the optical information reading device 20 according to the present embodiment, both the buffer members 28 and 29 are connected to the charging device 10 before this connection when the power receiving terminals 26 and 27 and the power feeding terminals 14 and 15 are connected. It is formed so as to be in contact with the conductive static elimination terminals 16 and 17 provided. Thus, when the power receiving terminals 26 and 27 and the power feeding terminals 14 and 15 are electrically connected to be charged by the charging device 10, the buffer members 28 and 29 are provided in the charging device 10 before this connection. Since the static electricity flows into the ground patterns 31 and 32 via the static elimination terminals 16 and 17 and the buffer members 28 and 29 even when the charging device 10 is charged with static electricity, the static elimination terminals 16 and 17 are in contact with each other. The influence of static electricity through the power receiving terminals 26 and 27 exposed to the outside can be reliably suppressed.

  Further, in the optical information reading device 20 according to the present embodiment, since both the buffer members 28 and 29 are disposed in the vicinity of the power receiving terminals 26 and 27, both the buffer members 28 and 29 with respect to the charging device 10 and the like. Is more easily contacted before the power receiving terminals 26 and 27, so that even when the charging device 10 or the like is charged with static electricity, the influence of static electricity via the power receiving terminals 26 and 27 exposed to the outside can be more reliably ensured. Can be suppressed.

  Furthermore, in the optical information reading apparatus 20 according to the present embodiment, both the buffer members 28 and 29 are always connected to the ground patterns 31 and 32 by being always pressed against the ground patterns 31 and 32. . By utilizing the elastic force of the buffer members 28 and 29, the buffer members 28 and 29 and the ground patterns 31 and 32 are surely in close contact with each other. Since connection through a connection member such as solder is not required, a simple and easy-to-manufacture configuration can be realized.

  Further, in the optical information reading device 20 according to the present embodiment, both the buffer members 28 and 29 are in contact with the conductive charge removal terminals 16 and 17 provided so as to protrude outward in the charging device 10. Is formed. Thereby, before the power receiving terminals 26 and 27 come into contact with the power feeding terminals 14 and 15 of the charging device 10, the buffer members 28 and 29 come into contact with the static elimination terminals 16 and 17 protruding outward. Therefore, the influence of static electricity through the power receiving terminals 26 and 27 exposed to the outside can be more reliably suppressed.

FIG. 11 is a front view showing an optical information reading device 20 according to a modification of the present embodiment.
As illustrated in FIG. 11, the buffer members 28 and 29 may be arranged such that the outer surface portions 28 a and 29 a are along the side surface of the grip portion 22. This makes it easier for the user to touch the buffer members 28 and 29 when gripping the grip portion 22, so that even if the user is charged with static electricity, the static electricity is grounded via the buffer members 28 and 29. It flows to the patterns 31 and 32, and the influence of static electricity via the power receiving terminals 26 and 27 exposed to the outside can be more reliably suppressed.

  In addition, as described above, the buffer members 28 and 29 are not limited to be provided only on the grip portion 22, and for example, another buffer member may be provided around the head 24. By connecting this other buffer member via a connector or the like and electrically connecting it to the ground patterns 31 and 32, the above-described static elimination function can be realized for the periphery provided with the other buffer member. .

In addition, this invention is not limited to the said embodiment, You may actualize as follows.
(1) The positive power receiving terminal 26 and the negative power receiving terminal 27 exposed to the outside of the housing 21 are not limited to functioning as charging terminals, but may function as connection terminals for communication, for example. . Even in this case, the influence of static electricity through the connection terminal exposed to the outside can be reliably suppressed.

(2) The inner surface portion 28b of the buffer member 28 is not limited to being electrically connected by contacting the ground pattern 31 in a state in which the protruding end portion 28c is constantly pressed from below and elastically deformed. Depending on the position or the like, it may be electrically connected via a connecting member such as a connector or solder. Similarly, the buffer member 29 may be connected to the ground pattern 32.

(3) Both the static elimination terminals 16 and 17 are not limited to being formed by bending a metal wire, similarly to the positive-side power supply terminal 14, but, for example, depending on the pressing direction by bending a flat conductive member. Thus, it may be configured as a discharge part formed to be elastically deformable.

(4) The present invention is not limited to being applied to a portable optical information reader that optically reads an information code such as a bar code or a two-dimensional code. For example, for information recorded on an RFID tag The present invention may be applied to portable terminals such as RFID tag reader / writers and payment terminals that perform wireless communication.

DESCRIPTION OF SYMBOLS 10 ... Charging apparatus 14 ... Positive side power supply terminal 15 ... Negative side power supply terminal 16, 17 ... Static elimination terminal (discharge part)
20: Optical information reader (portable terminal)
21 ... Case 22 ... Holding part 26 ... Positive power receiving terminal (connection terminal)
27 ... Negative power receiving terminal (connection terminal)
28, 29 ... buffer member 30 ... circuit board 31, 32 ... ground pattern

Claims (6)

In a portable terminal in which a connection terminal for electrically connecting an external device and a circuit board accommodated in the casing is exposed outside the casing,
A conductive cushioning member that covers and protects a portion of the housing;
The portable terminal, wherein the buffer member is always connected to a ground pattern of the circuit board.   The said buffer member is formed so that it may contact the electroconductive discharge part provided in the said external device before this connection in the case of the connection via the said connection terminal. Mobile device.   The mobile terminal according to claim 1, wherein the buffer member is disposed in the vicinity of the connection terminal.   The portable terminal according to claim 1, wherein the buffer member is disposed in a grip portion where the casing is gripped.   The mobile terminal according to claim 1, wherein the buffer member is always connected to the ground pattern by being constantly pressed against the ground pattern.   The said buffer member is formed so that it may contact with the electroconductive discharge part provided so that it may protrude outside in the said external device, The Claim 1 characterized by the above-mentioned. Mobile device.

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