JPH04119343U - Throttle position sensor - Google Patents

Abstract

(57) [Summary] [Purpose] To securely join connector terminals and connecting terminals,
A throttle position sensor is provided that establishes a stable connection between a connector terminal and a detection circuit on a board via a connection terminal. [Structure] A detection circuit of a board 10 supported by a housing 3 and a connector terminal 7a are connected via a connecting terminal 70. At this time, a pair of opposing locking pieces 70f and 70g are provided at the connecting portion of the connecting terminal 70 with the connector terminal 7a, and the end of the connector terminal 7a is held and joined between these locking pieces.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a throttle position sensor installed in an internal combustion engine, and particularly to a basic throttle position sensor. Throttle position where the detection circuit on the board and the connector terminal are connected via the connection terminal. related to sensor.

0002

[Conventional technology]

In internal combustion engines equipped with an electronically controlled fuel injection system, the throttle position A sensor is attached, and its output signal is used for fuel injection control, etc. This slot The throttle position sensor is connected to the throttle valve shaft and is typically The throttle opening changes depending on the throttle valve opening (hereinafter referred to as throttle opening). An idle signal that turns on and off depending on whether it is in the idle range or output range is output. .

0003 In such a throttle position sensor, the detection circuit is attached to a base. It has a connector terminal supported by a plate and a housing, and a detection circuit between the connector terminal and the board. are connected to each other via connection terminals. Connections between these connector terminals and connection terminals The connecting portion is joined by resistance welding with the plate surfaces of both terminals abutting each other.

0004

[Problem that the idea aims to solve]

However, in the above throttle position sensor, the connector terminal and When connecting the connecting terminals, the joining surfaces of both terminals may be misaligned, or one of the terminals may be bent. If this happens, positioning becomes difficult and problems occur in welding work. Just weld it and it will join. The tensile strength of the parts may be insufficient.

[0005] Therefore, the present invention reliably joins the connector terminals and the connection terminals, and A throttle port that maintains a stable connection with the detection circuit on the board via a connection terminal. The purpose is to provide a position sensor.

[0006]

[Means to solve the problem]

In order to achieve the above object, the present invention provides a shaft that is rotatably supported on the housing. a shaft, a rotating body provided at the tip of the shaft and housed in the housing, and the rotating body. The housing is supported at a predetermined distance from the rolling body, and a detection circuit is attached to the plate surface. a detection circuit of the board; and a connector terminal supported by the housing. and the throttle position sensor connected to the connector terminal via a connecting terminal. , a pair of opposing locking pieces are provided at the connection portion of the connection terminal with the connector terminal; and the ends of the connector terminals are held and joined between the locking pieces. It is.

[0007]

[Effect]

In the throttle position sensor configured as above, a pair of connection terminals The ends of the connector terminals are held and joined between the locking pieces. This allows the connection terminal and connector terminals are reliably joined and a stable joined state is maintained. Then, above The throttle position sensor described above is attached to an internal combustion engine and is linked to the throttle valve. When the shaft rotates, the rotating body rotates relative to the substrate. This relative According to the rotation of the shaft, a signal corresponding to the rotation of the shaft is output from the detection circuit of the board.

[0008]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a throttle position sensor 1 according to an embodiment of the present invention. It is attached to a throttle body (not shown), and the shaft 2 is attached to a throttle body (not shown). It is supported so as to rotate in conjunction with the torque shaft. In other words, the throttle report The position sensor 1 has a synthetic resin housing having two adjacent recesses 3a and 3b. A shaft is connected to a partition wall 3c between these recesses 3a and 3b via a bearing 4. 2 is rotatably supported.

[0009] A lever 5 accommodated in one recess 3a of the housing 3 is attached to one end of the shaft 2. is fixed, and the lever 5 is connected to a throttle shaft (not shown). . A return spring 6 is interposed between the housing 3 and the lever 5. The lever 5 is biased toward a predetermined initial position. Therefore, slots (not shown) With the opening of the throttle valve, the lever 5 linked to the throttle shaft returns to its original position. The shaft 2 is configured to be driven against the biasing force of the pull 6 and rotate. There is.

0010 The substrate 10 is disposed within the recess 3b of the housing 3. This board 1 As shown in FIG. 2, the lower plate surface of FIG. A detection circuit consisting of conductor 12b and conductor 12b is printed. The board 10 has connection terminals 70 to 73 are attached, and the resistor 12a is connected between the connection terminals 70 and 73. The connecting terminal 71 is connected to the conductor 12b, and the connecting terminal 72 is connected to the conductor 11b. It is. Further, the connection terminal 73 is also connected to the conductor 11a. and connect Terminals 70 to 73 are connected to connector terminals 7a to 7d, respectively. connector The terminals 7a to 7d are L-shaped gold-plated terminals, and are located inside the housing 3 as shown in FIG. A connector 8 is embedded in the housing 3 and extends laterally to form a connector 8 integrally with the housing 3. ing.

[0011] The connection terminals 70 to 73 are tin-plated terminals of the same shape, as shown in FIGS. 3 and 4. It is configured. Hereinafter, the connection terminal 70 will be explained as a representative. Connection terminal 70 includes a board connecting portion 70a which is soldered to a conductor constituting the detection circuit of the board 10; , gripping portions 70b and 70c facing these and holding the substrate 10 are formed in a bent manner. . Then, a connecting portion 70e with the connector terminal 7a is formed via the connecting portion 70d. ing. A pair of locking pieces 70f and 70g are formed on both sides of the connecting portion 70e, and It is formed in a U-shape.

0012 After the connection terminal 70 is attached to the board 10, between the locking pieces 70f and 70g, One end portion of the connector terminal 7a is arranged. In this way, the connector terminal 7a is connected to the locking piece. 70f and 70g, the connecting part 70e of the connecting terminal 70 is connected by resistance welding. It is joined. Therefore, the relationship between the connection terminal 70 and the connector terminal 7a is always stable. The bonded state is maintained to ensure a predetermined tensile strength. In addition, the locking pieces 70f, 7 The shape of 0g is not limited to the one shown in FIG. 4, but can be any shape that can hold the end of the connector terminal 7a. It may be of any shape as long as it has a shape.

[0013] On the other hand, the axial tip of the shaft 2 is provided with a truncated conical rotor, which is a rotating body according to the present invention. 20 is provided and accommodated in the other recess 3b of the housing 3. rotor Movable contacts 21 and 22 of a forked brush as shown in FIG. 2 are fixed to the top surface of 20. ing. The movable contact 21 has one brush that presses against the conductor 11a and the other brush that presses against the conductor 11a. 11b, one brush of the movable contact 22 is placed in contact with the resistor 12a. The other brush is arranged so as to press against the conductor 12b and the other brush press against the conductor 12b. Then, The resistor 12a and the conductor 12b are electrically connected via the movable contact 22, and the conductor 11a and the conductor 1 1b is configured to be electrically connected via the movable contact 21.

[0014] The substrate 10 and rotor 20 are housed in the recess 3b of the housing 3, This recess 3b is sealed tightly by a synthetic resin cover 13 via a rubber seal member 9. Closed.

[0015] In the throttle position sensor 1 of this embodiment having the above configuration, the connection The connector terminal 7a is connected to a power source (not shown), and the connector terminal 7d is grounded. child As a result, the resistor 12a is connected via the connector terminals 7a, 7d and the connecting terminals 70, 73. A predetermined voltage is applied to. Then, via the connection terminal 71 connected to the conductor 12b, Then, a voltage signal corresponding to the throttle opening is output from the connector terminal 7b. Ma In addition, when the conductor 11b is in electrical continuity with the conductor 11a, a signal is transmitted from the connector terminal 7c. A constant voltage idle signal is output.

[0016] That is, the lever 5 is driven in conjunction with a throttle valve (not shown), and the shaft 2 rotates within the bearing 4. In response to this rotation of the shaft 2, the movable contact 21 first becomes conductive. The conductors 11a and 11b are separated from the conductors 11a and 11b, and the conductors 11a and 11b, which were in a conductive state, are opened. Ru. As a result, the predetermined voltage signal at connector terminal 7c disappears, and the idle state is released. detected. At the same time, the movable contact 22 connects the resistor 12a and the conductor 12b. The resistance value between the connector terminals 7a and 7b changes depending on the rotation angle of the shaft 2. changes. Thus, a voltage proportional to the rotation angle of the shaft 2 is output from the connector terminal 7b. A pressure signal, that is, a throttle opening signal is output.

[0017] In the throttle position sensor 1, as described above, the connection terminal 70 73 and connector terminals 7a to 7d are securely welded together, so they are always stable. The connection is maintained in a stable state, resulting in good reliability. Note that the above embodiment uses a movable contact. The throttle opening and idle speed are controlled by the sliding action between points 21 and 22 and the resistor 12a, etc. For example, the method described in Japanese Patent Application Laid-Open No. 2-298815 It can also be applied to a throttle position sensor using a magnetoresistive element.

[0018]

[Effect of the idea]

Since the present invention is configured as described above, it produces the effects described below. That is, according to the throttle position sensor of the present invention, the pair of connecting terminals are locked. Since the end of the connector terminal is held between the two halves and joined, the connector terminal and the connecting end are It is possible to weld the parts easily and reliably, and the reliability is improved compared to the conventional method.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a throttle position sensor according to an embodiment of the present invention.

FIG. 2 is a plan view of a board and a connector terminal in a throttle position sensor according to an embodiment of the present invention.

FIG. 3 is a plan view of a connection terminal in an embodiment of the present invention.

FIG. 4 is a perspective view of a connection terminal in an embodiment of the present invention.

[Explanation of symbols]

1 Throttle position sensor 2 shaft 3 Housing 7a, 7b, 7c, 7d Connector terminal 9 Seal member 10 Substrate 11a, 11b conductor 12a Resistor 12b conductor 13 Cover 20 Rotor (rotating body) 70, 71, 72, 73 connection terminal 70f, 70g locking piece

Claims (1)

[Scope of utility model registration request] 1. A shaft rotatably supported in a housing, a rotating body provided at the tip of the shaft and housed in the housing, and a plate supported on the housing at a predetermined distance from the rotating body. In a throttle position sensor comprising a board having a detection circuit attached to its surface and a connector terminal supported by the housing, the detection circuit of the board and the connector terminal are connected via a connection terminal, the connector terminal of the connection terminal A throttle position sensor characterized in that a pair of opposing locking pieces is provided at a connecting portion with the connector terminal, and an end of the connector terminal is held and joined between the locking pieces.