JPH0686708U - Optical sensor probe - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent disconnection of the wiring pattern formed on the terminal board of the FPC due to external force. A wiring pattern 2 formed on a terminal board 5 of an FPC 1 is covered with a cover film 8, an opening 9 for exposing the wiring pattern 2 is provided in the cover film 8, and the periphery of the opening 9 is covered with the wiring pattern 2. Tilt with respect to the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a probe for an optical sensor, which is wound around a subject's finger or the like to measure the oxygen saturation of blood in a blood vessel, and is formed especially on the terminal portion of a printed wiring board at the time of attachment / detachment. The present invention relates to an optical sensor probe capable of preventing disconnection of a wiring pattern.

[0002]

[Prior art]

 The optical sensor probe as described above has conventionally been constructed as shown in FIGS. 5 and 6. That is, both ends of a strip-shaped flexible printed wiring board (hereinafter referred to as FPC) 1 are formed in a substantially disk shape, and a wiring pattern 2 is formed on one surface of the FPC 1 in a predetermined shape by printing or the like. There is. A light emitting element 3 and a light receiving element 4 are mounted on both ends of the wiring pattern 2, respectively. A terminal plate 5 is integrally provided so as to project at a right angle in the central portion of the FPC 1 in the longitudinal direction. The wiring pattern 2 is led out to the terminal plate 5 and terminals are respectively provided at the end portions of each wiring pattern 2. 6 is provided.

The light emitting element 3 and the light receiving element 4 are molded and protected by a transparent resin. The upper surface of the FPC 1 and the upper surface of the terminal board 5 other than the portion covered with the mold resin 7 are continuously covered with a cover film 8, respectively, and the cover film 8 covering the terminal board 5 is provided with the wiring pattern 2. An opening 9 to be exposed is formed.

[0004]

[Problems to be solved by the device]

 The opening 9 formed in the cover film 8 for covering the terminal board 5 is conventionally formed by two sides perpendicular to the axial direction of the wiring pattern 2 as shown in FIGS. 7 and 8. It had been. For this reason, when the probe 11 wound around the finger of the subject is detached from the finger or the like, if the terminal plate 5 is to be peeled off, the cover film 11 will be exposed at the two parallel sides of the opening 9. There is a problem that the bending stress is concentrated and the wiring pattern 2 of this portion 2a is easily broken as shown in FIG.

The present invention has been made in view of the above circumstances, and it is possible to prevent disconnection of a wiring pattern formed on a terminal plate even when external stress is applied to the terminal plate of the FPC. An object is to provide a sensor probe.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a terminal board that is integrally connected to a flexible printed wiring board and draws out a wiring pattern formed on the printed wiring board, the printed wiring board and the terminal board. In a probe for an optical sensor having a cover film covering each of the wiring patterns formed in the above, an opening for exposing the wiring pattern is formed in the cover film covering the terminal plate, and a peripheral edge of the opening is formed. It is characterized in that it is inclined with respect to the axial direction of the wiring pattern.

[0007]

[Action]

 According to the above structure, when the terminal board is to be peeled off from the mounting part of the subject, at least a part of the wiring pattern is covered with the cover film in the direction perpendicular to the axial direction of the wiring pattern. Has been done. As a result, in the opening 9, the occurrence of disconnection of the wiring pattern can be significantly reduced as compared with the case where all the wiring patterns are exposed at the position perpendicular to the axial direction of the wiring pattern. .

[0008]

【Example】

 An embodiment of the optical sensor probe of the present invention will be described below with reference to the drawings.

1 to 3 show the structure of a terminal board 5 according to an embodiment of the present invention. In these figures, portions corresponding to those of the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. The feature of this embodiment is the shape of the opening 9 formed in the cover film 8 that covers the terminal plate 5, and the configuration of the optical sensor probe 11 is almost the same as the conventional example shown in FIGS.

As shown in FIG. 1, a fan-shaped opening 9 is formed in the cover film 8 that covers the terminal plate 5, and the two opposite sides of the opening 9 are located at the center of the terminal plate 5 in the width direction. It is formed in a semicircular shape having a center. Further, as shown in FIGS. 2 and 3, the wiring pattern 2 exposed in the opening 9 serves as the terminal 6, the coating of the tip of the lead wire 12 is peeled off from the terminal 6, and the core wire 12 a is soldered with the solder 13. Has been done.

According to the present embodiment, the wiring pattern 2 formed on the terminal board 5 is covered with the cover film 8 which is axially displaced depending on the position, so that the probe 11 is mounted while holding the terminal board 5. When peeling from the part, at least a part of the wiring pattern 2 is covered with the cover film 8 in a direction perpendicular to the axial direction of the wiring pattern 2 to prevent pattern disconnection.

In the above-described embodiment, the case where the shape of the peripheral edge of the opening 9 of the cover film 8 of the terminal board 5 is a semi-circle is described, but this shape may be corrugated as shown in FIG. .

[0013]

[Effect of device]

 As described above, according to the optical sensor probe of the present invention, the cover film covering the terminal plate of the FPC is provided with the opening for exposing the wiring pattern, and the periphery of the opening is arranged in the axial direction of the wiring pattern. Since the terminals are inclined, the disconnection of the wiring pattern can be prevented even if an external force is applied to the terminal board.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a terminal plate of an embodiment of a probe for an optical sensor of the present invention.

FIG. 2 is a plan view showing a state in which lead wires are connected to the terminals of the terminal board of FIG.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a plan view showing the structure of a terminal board according to another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing the configuration of an example of a conventional optical sensor probe.

FIG. 6 is a plan view of FIG.

7 is an enlarged plan view of the terminal plate of FIG.

8 is a cross-sectional view taken along line BB of FIG.

9 is a vertical cross-sectional view showing a broken state of the wiring pattern shown in FIG.

[Explanation of symbols]

1 FPC (flexible printed wiring board) 2 wiring pattern 5 terminal board 8 cover film 9 opening

Claims (1)

[Scope of utility model registration request] 1. A terminal board which is integrally connected to a flexible printed wiring board and draws out a wiring pattern formed on the printed wiring board, and the printed wiring board and the wiring formed on the terminal board, respectively. In a probe for an optical sensor including a cover film that covers a pattern, an opening that exposes the wiring pattern is provided in the cover film that covers the terminal board, and a peripheral edge of the opening is arranged in an axial direction of the wiring pattern. A probe for an optical sensor, which is tilted with respect to.