Throttle grip device

Abstract

To provide a throttle grip device which can reproduce transmission loss at the time of rotation operation of a throttle grip while detecting rotation operation by a sensor, reduces a sense of incongruity at the time of operation, and can improve operability.SOLUTION: A throttle grip device includes an interlock member 2 which can be rotated by interlocking with a throttle grip G, a case 1 for rotatably holding the interlock member 2, first energization means 3 for energizing the interlock member 2 toward an initial position at the time of normal rotation a of the throttle grip G, second energization means 4 for energizing the interlock member 2 toward the initial position at the time of inverse rotation b of the throttle grip G, and a magnetic sensor 9 capable of detecting a rotation angle of the throttle grip G, wherein at the time of the normal rotation a of the throttle grip G, the rotation operation of the throttle grip G is transmitted to the interlock member 2 through the second energization means 4.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a throttle grip device in which a drive source of a vehicle is controlled based on a rotational operation of a throttle grip.

Background Art

[0002] In recent motorcycles, throttle grip devices have been widely used, which are configured to detect the rotation angle of a throttle grip with a throttle opening sensor such as a potentiometer and send the detected value as an electric signal to an electronic control unit or the like mounted on the motorcycle. In a motorcycle, based on such a detection signal, an electronic control unit performs a predetermined calculation, and based on the calculation result, a drive source of the motorcycle (for example, ignition timing of an engine, opening and closing of an intake valve or a throttle valve) is controlled.

[0003] As a conventional throttle grip device, for example, the one disclosed in Patent Document 1 can be mentioned. Such a conventional throttle grip device connects the throttle grip and an interlocking member by engaging an engaging portion formed on the throttle grip with an engaged portion formed on the interlocking member, and detects the rotation angle of the throttle grip by detecting the rotation angle of the interlocking member with a sensor, thereby performing engine control.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional technology described above, the rotation of the throttle grip is detected by a sensor, which results in a response that is significantly higher than the driver expects, causing an unnatural feeling in operation. In other words, when the rotation of the throttle grip is transmitted to the engine via a wire for control, transmission loss occurs due to the biasing force (tension) of the wire during operation. In contrast, when the rotation of the throttle grip is detected by a sensor and the engine is controlled by that, there is almost no transmission loss, which could actually worsen the operability.

[0006] The present invention has been made in view of these circumstances, and aims to provide a throttle grip device that can reproduce the transmission loss during rotational operation of the throttle grip while detecting rotational operation by a sensor, thereby reducing discomfort during operation and improving operability. [Means for solving the problem]

[0007] The invention described in claim 1 includes a throttle grip that can be rotated by a driver and is capable of forward rotation in a predetermined direction from an initial position and reverse rotation in the opposite direction to said predetermined direction; an interlocking member having an engaged portion that can engage with an engaging portion formed on the throttle grip and capable of rotating in conjunction with the throttle grip; a case that rotatably holds the interlocking member; a first biasing means that biases the interlocking member toward the initial position when the throttle grip rotates forward; and a second biasing means that biases the interlocking member toward the initial position when the throttle grip rotates backward. A throttle grip device comprising a rotation angle detection means capable of detecting the rotation angle of the throttle grip by detecting the rotation angle of the interlocking member, wherein when the throttle grip rotates forward, the vehicle's drive source can be controlled according to the rotation angle of the throttle grip detected by the rotation angle detection means, and when the throttle grip rotates backward, a predetermined function of the vehicle can be activated or deactivated, characterized in that when the throttle grip rotates forward, the rotation operation of the throttle grip is transmitted to the interlocking member via the second biasing means.

[0008] The invention described in claim 2 is characterized in that the throttle grip device described in claim 1 is equipped with a biasing force selection means to which the second biasing means is attached, and when the throttle grip rotates in the forward direction, it rotates together with the interlocking member and transmits the rotational operation of the throttle grip to the interlocking member via the second biasing means, and when the throttle grip rotates in the reverse direction, it stops by contacting a stopper formed in the case while allowing the rotation of the interlocking member, thereby applying the biasing force of the second biasing means to the interlocking member.

[0009] The invention described in claim 3 is a throttle grip device according to claim 2, wherein the second biasing means consists of a coil spring attached to the biasing force selection means with one end in contact with a spring receiving portion formed therein, and when the throttle grip rotates in the forward direction, the engaging portion presses against the spring receiving portion to generate a biasing force for the second biasing means.

[0010] The invention described in claim 4 is characterized in that, in the throttle grip device described in claim 1, it comprises means for providing a resistive force that generates sliding resistance when the interlocking member rotates. [Effects of the Invention]

[0011] According to the invention of claim 1, when the throttle grip rotates in the forward direction, the rotational operation of the throttle grip is transmitted to the interlocking member via the second biasing means. This allows the biasing force of the second biasing means to be applied when the throttle grip rotates in the forward direction, enabling the detection of rotational operation by the sensor while reproducing the transmission loss during the rotational operation of the throttle grip. This reduces discomfort during operation and improves operability.

[0012] Furthermore, when the throttle grip rotates in the forward direction, the rotational operation of the throttle grip is transmitted to the interlocking member via the second biasing means. Therefore, the second biasing means, which acts as a biasing means when the throttle grip rotates in the reverse direction, can be reused to apply a biasing force when the throttle grip rotates in the forward direction, thereby suppressing an increase in the number of parts.

[0013] According to the invention of claim 2, a second biasing means is attached, and when the throttle grip rotates forward, it rotates together with the interlocking member and transmits the rotational operation of the throttle grip to the interlocking member via the second biasing means. When the throttle grip rotates backward, the second biasing means allows the interlocking member to rotate but stops by contacting a stopper formed in the case, thereby applying the biasing force of the second biasing means to the interlocking member. This allows for smooth switching of the action of the second biasing means between forward and reverse rotation of the throttle grip.

[0014] According to the invention of claim 3, the second biasing means consists of a coil spring attached to the biasing force selection means with one end in contact with a spring receiving portion formed therein, and when the throttle grip rotates in the forward direction, the engaging portion presses against the spring receiving portion, generating a biasing force for the second biasing means. Therefore, the second biasing means can be used to apply a biasing force when the throttle grip rotates in the forward direction.

[0015] According to the invention of claim 4, since the device is equipped with a means for applying resistance that generates sliding resistance when the interlocking member rotates, when the throttle grip rotates in the forward direction, the biasing force of the second biasing means can be applied in conjunction with the sliding resistance of the resistance applying means, making it possible to make fine adjustments to the operability. [Brief explanation of the drawing]

[0016] [Figure 1] Overall perspective view showing a throttle grip device according to an embodiment of the present invention. [Figure 2] Front view and top view showing the throttle grip device. [Figure 3]Cross-sectional view taken along line III-III in FIG. 2 [Figure 4] Cross-sectional view taken along line IV-IV in FIG. 2 [Figure 5] Exploded perspective view showing the main components of the throttle grip device [Figure 6] Perspective view showing the throttle grip of the throttle grip device [Figure 7] Perspective view showing the unit of the main components of the throttle grip device [Figure 8] Two views showing the unit of the main components of the throttle grip device [Figure 9] Cross-sectional view taken along line IX-IX in FIG. 8 [Figure 10] Cross-sectional view taken along line X-X in FIG. 8 [Figure 11] Three views showing the interlocking member of the throttle grip device [Figure 12] Three views showing the biasing force selection means of the throttle grip device [Figure 13] Two views showing the case of the throttle grip device [Figure 14] Graph showing the relationship between the operating rotation angle and torque in the throttle grip device according to an embodiment of the present invention and other conventional throttle grip devices

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The throttle grip device according to this embodiment is, as shown in FIGS. 1 and 2, for detecting the rotation angle of a throttle grip G attached to a handlebar H of a two-wheeled vehicle and transmitting the detection signal to an electronic control device such as an ECU mounted on the two-wheeled vehicle to control a drive source (engine). As shown in FIGS. 3 to 10, it includes a throttle grip G, a case 1, an interlocking member 2, a first biasing means 3, a second biasing means 4, a rotating member 5, a magnetic sensor 9 (rotation angle detection means), and a resistance force applying means 7.

[0018] Case 1 is installed inside a switch case S (see Figures 1 and 2) attached to the tip end of the handlebar H of a motorcycle (vehicle) (the base end of the throttle grip G). It houses various components that make up the throttle grip device and rotatably holds the interlocking member 2 and the rotating member 5, etc. As shown in Figure 13, Case 1 consists of a molded part having a first housing section 1a that rotatably houses the interlocking member 2, a second housing section 1b that rotatably houses the rotating member 5, a third housing section 1c that houses the resistance force applying means 7, a stopper section 1d that the protruding portion 6b of the biasing force selection means 6 can contact, and a locking section 1e that can lock one end of the first biasing means 3. Reference numeral 11 indicates a plate-shaped lid member for closing the opening side of Case 1.

[0019] The throttle grip G extends from the switch case S and is designed to be rotated by the driver while being held. As shown in Figures 1 and 2, it is capable of forward rotation a in a predetermined direction around its axis from its initial position, and reverse rotation b in the opposite direction. An engaging portion Ga (see Figure 6) with a protruding shape is formed on the base end of the throttle grip G. This engaging portion Ga engages with the engaged portion 2a (see Figures 5, 7, 11, etc.) of the interlocking member 2, thereby connecting the throttle grip G and the interlocking member 2.

[0020] The interlocking member 2 has a recessed engaged portion 2a that can engage with the engaging portion Ga formed on the throttle grip G, and can rotate in conjunction with the forward rotation a and reverse rotation b of the throttle grip G. Specifically, as shown in Figure 11, the interlocking member 2 according to this embodiment consists of an annular member having an engaged portion 2a, a pair of housing portions 2b, a flange 2c, and a gear 2d. In this embodiment, the interlocking member 2 has a sliding surface n that allows the resistance force applying means 7 to slide.

[0021] The engaged portion 2a consists of a concave shape formed at a position corresponding to the engaged portion Ga of the throttle grip G, and the base end of the throttle grip G is connected to the interlocking member 2 with the engaged portion Ga fitted into the engaged portion 2a and engaged. As a result, the interlocking member 2 can rotate in conjunction with the rotation of the throttle grip G. The engaged portion 2a is formed on the surface of the interlocking member 2 (one surface that can be exposed to the outside when assembled to the case 1, as shown in Figure 7), and the housing portion 2b is formed on the other surface.

[0022] Here, as shown in Figures 5 and 11, the engaged portion 2a of the interlocking member 2 according to this embodiment has an open surface 2aa and a wall surface 2ab in the rotational direction of the interlocking member 2, and the engaged portion Ga can be fitted into the position between these open surface 2aa and wall surface 2ab. As shown in Figure 7, the back surface 6ab of the spring receiving portion 6a formed on the biasing force selection means 6 faces the inside of the engaged portion 2a on the open surface 2aa.

[0023] When the throttle grip G is rotated forward a, the engaging portion Ga presses against the spring receiving portion 6a facing the opening surface 2aa, compressing the second biasing means 4 and rotating the interlocking member 2 in the direction of forward rotation a. Also, when the throttle grip G is rotated backward b, the engaging portion Ga can press against the wall surface 2ab and rotate the interlocking member 2 in the direction of backward rotation b. The biasing force selection means 6, as will be described later, rotates together with the interlocking member 2 when the throttle grip G is rotating forward, and remains stationary when the throttle grip G is rotating backward, while allowing the rotation of the interlocking member 2.

[0024] The housing portion 2b consists of a pair of arc-shaped grooves formed between the engaged portions 2a, and the second biasing means 4 can be housed inside each of them. The interlocking member 2 has a flange 2c formed around it in the circumferential direction, and a gear 2d formed over a predetermined range. As shown in Figures 3, 4, and 10, this gear 2d is assembled to mesh with a gear formed on the outer circumference of the rotating member 5, so that the rotating member 5 rotates in conjunction with the rotation of the interlocking member 2.

[0025] The first biasing means 3 consists of a torsion coil spring and is a return spring that biases the interlocking member 2 toward its initial position when the throttle grip G rotates forward a. Specifically, the first biasing means 3 is assembled with one end locked to the locking portion 1e of the case 1 and the other end locked to the interlocking member 2. When the throttle grip G rotates forward a, the biasing force is transmitted to the throttle grip G, thereby applying a force to return the throttle grip G to its initial position.

[0026] The second biasing means 4 consists of a pair of coil springs attached to a spring receiving portion 6a (see Figures 6, 10, and 12) formed on the biasing force selection means 6, with one end in contact with it, and is intended to bias the interlocking member 2 toward its initial position when the throttle grip G rotates in the reverse direction b. Specifically, when the throttle grip G is rotated in the reverse direction b, the second biasing means 4 transmits its biasing force to the throttle grip G, thereby applying a force to return the throttle grip G to its initial position.

[0027] The rotating member 5 is capable of rotating in conjunction with the interlocking member 2, and is housed in the second housing section 1b of the case 1 (see Figure 13), and is rotatable about an axis L (see Figures 3-5, 9). When the interlocking member 2 rotates, the rotating member 5 rotates about the axis L at an angle of rotation corresponding to the rotation angle of the interlocking member 2. As shown in Figure 9, the rotating member 5 is connected to a magnet M by the axis L, and the magnet M is configured to rotate about the axis L together with the rotating member 5.

[0028] As shown in Figure 9, the magnetic sensor 9 (rotation angle detection means) consists of a sensor positioned on the extension of the axis L, and is capable of detecting the rotation angle of the throttle grip G by detecting changes in magnetism (changes in the direction of the magnetic field) generated from the magnet M. Specifically, the magnetic sensor 9 can obtain an output voltage corresponding to the change in the magnetic field (change in magnetic flux density) of the magnet M, and is composed of, for example, a Hall element, which is a magnetic sensor that utilizes the Hall effect (specifically, a linear Hall IC that can obtain an output voltage proportional to the magnetic field (magnetic flux density) of the magnet M). In this embodiment, the magnetic sensor 9 is formed on a printed circuit board 8 on which a predetermined electrical circuit is printed, and is covered with a housing member 10 made of a non-magnetic material.

[0029] In this embodiment, as the throttle grip G rotates forward a, the interlocking member 2 rotates in the same direction, causing the rotating member 5 to rotate in conjunction with it according to the gear ratio (the gear ratio of the interlocking member 2 and the rotating member 5). The magnet M connected to the rotating member 5 also rotates in the same direction by the same angle. As a result, in this embodiment, the magnetic field of the magnet M changes according to the rotation angle of the rotating member 5, so an output voltage corresponding to the rotation angle can be obtained, and the rotation angle of the interlocking member 2 (i.e., the rotation angle of the throttle grip G) can be detected based on this output voltage. The rotation angle of the throttle grip G detected in this way is transmitted as an electrical signal to the ECU (Engine Control Unit) mounted on the motorcycle, so that the vehicle's drive source (e.g., the engine) can be controlled according to the rotation angle of the throttle grip G.

[0030] On the other hand, in the throttle grip device according to this embodiment, when the throttle grip G rotates in the reverse direction b, the interlocking member 2 rotates in the same direction, and the rotating member 5 also rotates in conjunction according to the gear ratio (gear ratio of the interlocking member 2 and the rotating member 5), and the magnet M attached to the rotating member 5 also rotates in the same direction by the same angle. As a result, in the throttle grip device according to this embodiment, the magnetic field of the magnet M changes according to the rotation angle of the rotating member 5, so an output voltage corresponding to the rotation angle can be obtained, and the reverse rotation b of the throttle grip G can be detected.

[0031] As described above, the throttle grip device according to this embodiment can activate or deactivate a predetermined function of the motorcycle when a reverse rotation b of the throttle grip G is detected. In this embodiment, it is applied to a motorcycle equipped with a constant speed holding device (auto cruise device) that maintains a constant driving speed, and when the throttle grip G is rotated in the reverse direction b (rotation operation in the opposite direction to the forward rotation a that fully opens the throttle from the initial position), the constant speed holding control can be stopped (canceled).

[0032] The resistance-applying means 7 generates sliding resistance (frictional resistance due to sliding) when the throttle grip G rotates, thereby generating a rotational load. It consists of a friction member assembled in contact with the sliding surface n formed over the circumferential direction of the interlocking member 2. This resistance-applying means 7 is housed in the third housing portion 1c of the case 1 and is assembled by being pressed against the sliding surface n of the interlocking member 2 by the biasing force of the spring. When the interlocking member 2 rotates, it slides against the sliding surface n, generating a frictional force and creating a desired rotational load.

[0033] As shown in Figures 5 and 12, the biasing force selection means 6 consists of an annular plate material having a pair of spring receiving portions 6a and a protruding portion 6b that protrudes laterally, with the second biasing means 4 assembled to each of the pair of spring receiving portions 6a. One surface of the spring receiving portion 6a is a receiving surface 6aa that receives one end of the second biasing means 4, and the other surface is a back surface 6ab that faces the opening surface 2aa of the engaged portion 2a of the interlocking member 2.

[0034] In this embodiment, when the engaging portion Ga of the throttle grip G is fitted into the engaged portion 2a of the interlocking member 2, the engaged portion 2a and the back surface 6ab of the spring receiving portion 6a face each other, as shown in Figures 8 and 10. As a result, when the throttle grip G is rotated forward a, the engaged portion 2a presses against the back surface 6ab of the spring receiving portion 6a, generating a biasing force for the second biasing means 4, and the rotational operation of the throttle grip G is transmitted to the interlocking member 2 via the second biasing means 4.

[0035] Thus, when the throttle grip G rotates forward a, the biasing force selection means 6 rotates together with the interlocking member 2 and transmits the rotational operation of the throttle grip G to the interlocking member 2 via the second biasing means 4. Therefore, when the throttle grip G rotates forward a, the operating force transmitted from the engagement portion Ga to the interlocking member 2 can be blunted by the biasing force (repulsive force) of the second biasing means 4, thereby reducing the responsiveness of the interlocking member 2 and lowering the response (response characteristics) of the throttle grip device. On the other hand, when the throttle grip G rotates in the reverse direction, the biasing force selection means 6 is configured to allow the rotation of the interlocking member 2 and stop by contacting the stopper portion 1d (see Figure 13) formed on the case 1, thereby applying the biasing force of the second biasing means 4 to the interlocking member 2.

[0036] In the throttle grip device according to this embodiment, when the throttle grip G rotates forward a, the rotational operation (operating force) of the throttle grip G is transmitted to the interlocking member 2 via the second biasing means 4. As a result, the throttle grip device according to this embodiment can reduce the torque, especially in the initial stages of rotation, compared to a device that transmits the rotational operation of the throttle grip G via a wire.

[0037] Specifically, a throttle grip device according to this embodiment (Example), a throttle grip device that transmits the rotational operation of the throttle grip G via a wire (Comparative Example 1), and a throttle grip device that detects the rotational operation of the throttle grip G with a sensor and does not apply a biasing force by the second biasing means 4 or the like during forward rotation (Comparative Example 2) were prepared, and the relationship between the rotational operation angle and torque for each was measured. As shown in Figure 14, the results were γ for the Example, α for Comparative Example 1, and β for Comparative Example 2.

[0038] Therefore, the throttle grip device according to this embodiment can reduce the torque, especially in the initial stages of rotation, compared to Comparative Example 1, in which the rotational operation of the throttle grip G is transmitted via a wire. This reduces the feeling of discomfort during operation compared to Comparative Example 2. In the middle and final stages of rotation, the torque tendency of Comparative Example 1 can be approximated by arbitrarily changing, for example, the sliding resistance of the resistance force applying means 7.

[0039] According to the throttle grip device of this embodiment, when the throttle grip G rotates in the forward direction, the rotational operation of the throttle grip G is transmitted to the interlocking member 2 via the second biasing means 4, so that the biasing force of the second biasing means 4 can be applied when the throttle grip G rotates in the forward direction. As a result, the throttle grip device of this embodiment can reproduce the transmission loss during the rotational operation of the throttle grip G while allowing the sensor to detect the rotational operation, thereby reducing the feeling of discomfort during operation and improving operability.

[0040] In particular, in the throttle grip device according to this embodiment, when the throttle grip G rotates forward a, the rotational operation of the throttle grip G is transmitted to the interlocking member 2 via the second biasing means 4. That is, the throttle grip device according to this embodiment can apply a biasing force to the throttle grip G when it rotates forward by reusing the second biasing means 4, which acts as a biasing means when the throttle grip G rotates backward b, thereby suppressing an increase in the number of parts.

[0041] Furthermore, the throttle grip device according to this embodiment is equipped with a biasing force selection means 6 to which a second biasing means 4 is attached. When the throttle grip G rotates forward a, the second biasing means 4 rotates together with the interlocking member 2 and transmits the rotation operation of the throttle grip G to the interlocking member 2 via the second biasing means 4. When the throttle grip G rotates backward b, the biasing force selection means 6 allows the rotation of the interlocking member 2 to continue, stops by contacting a stopper portion 1d formed in the case 1, and applies the biasing force of the second biasing means 4 to the interlocking member 2. As a result, the throttle grip device according to this embodiment can smoothly switch the action of the second biasing means 4 between forward and reverse rotation of the throttle grip G.

[0042] Furthermore, the second biasing means 4 according to this embodiment consists of a coil spring attached with one end in contact with a spring receiving portion 6a formed on the biasing force selection means 6, and when the throttle grip G rotates forward a, the engaging portion Ga presses against the spring receiving portion 6a, generating a biasing force for the second biasing means 4. As a result, the throttle grip device according to this embodiment can apply a biasing force to the throttle grip G when it rotates forward using the second biasing means 4.

[0043] Furthermore, the throttle grip device according to this embodiment is equipped with a resistance force applying means 7 that generates sliding resistance when the interlocking member 2 rotates. Therefore, when the throttle grip G rotates in the forward direction, the biasing force of the second biasing means 4 can be applied in conjunction with the sliding resistance of the resistance force applying means 7, allowing for fine adjustment of operability. In this embodiment, the resistance force applying means 7 slides on the sliding surface n formed on the flange 2c of the interlocking member 2, but it may also slide on other parts of the interlocking member 2.

[0044] The throttle grip device according to this embodiment has been described above, but the present invention is not limited thereto. For example, in the throttle grip device according to this embodiment, the spring receiving portion 6a is brought into contact with the second biasing means 4 to compress it and generate a biasing force, but the engaging portion Ga may directly press one end of the second biasing means 4, or the second biasing means 4 may be made of an elastic body different from a coil spring, etc. Furthermore, in the throttle grip device according to this embodiment, the magnetic sensor 9 may be replaced with another sensor (such as a sensor that does not use magnetism) that can detect the rotation angle of the throttle grip G.

[0045] Furthermore, in the throttle grip device according to this embodiment, the system is configured to stop (cancel) the constant speed maintenance control of the constant speed holding device (auto cruise device) when the throttle grip G is rotated in the reverse direction. However, it is sufficient if detecting the rotation of the throttle grip G in the reverse direction activates or deactivates a predetermined function of the vehicle. For example, the system may activate authentication in an immobilizer system or smart entry system, activate a starter to start the engine, or activate emergency lighting means such as hazard lights when the throttle grip G is rotated in the reverse direction. The applicable vehicles are not limited to motorcycles as in this embodiment, but may also be other vehicles with handlebars H (e.g., ATVs and snowmobiles). In addition, the vehicle to which this embodiment is applied is not limited to a vehicle with an engine as the drive source, but may also be a vehicle with an electric motor as the drive source. [Industrial applicability]

[0046] If the throttle grip device transmits the rotational operation of the throttle grip to the interlocking member via a second biasing means when the throttle grip rotates in the forward direction, then it can be applied to devices with different external shapes or those with added functions. [Explanation of Symbols]

[0047] 1 case 1d Stopper part 1e Locking part 2 Interlocking members 2a Engaged part 2aa opening surface 2ab Wall surface 2b Storage area 2c flange 2D Gear 3. First biasing means (torsion coil spring) 4. Second biasing means (coil spring) 5 Rotating Member 6. Means for selecting biased forces 6a Spring receiving section 6aa receiving surface 6ab back 6b Projection 7. Means of imparting resistance 8 Printed circuit boards 9. Magnetic sensor (rotation angle detection means) 10. Housing member 11 Lid member G Throttle Grip Ga engagement part M magnet n sliding surface

Claims

1. A throttle grip that allows the driver to rotate it, enabling forward rotation in a predetermined direction from an initial position and reverse rotation in the opposite direction to that predetermined direction, An interlocking member having an engaged portion that can engage with an engaging portion formed on the throttle grip, and which can rotate in conjunction with the throttle grip, A case that rotatably holds the aforementioned interlocking member, When the throttle grip rotates in the forward direction, a first biasing means biases the interlocking member toward its initial position, When the throttle grip rotates in the reverse direction, a second biasing means biases the interlocking member toward its initial position, A rotation angle detection means capable of detecting the rotation angle of the throttle grip by detecting the rotation angle of the interlocking member, A throttle grip device comprising the following: when the throttle grip rotates in the forward direction, the vehicle's drive source can be controlled according to the rotation angle of the throttle grip detected by the rotation angle detection means; and when the throttle grip rotates in the reverse direction, a predetermined function of the vehicle can be activated or deactivated. A throttle grip device characterized in that when the throttle grip rotates in the forward direction, the rotational operation of the throttle grip is transmitted to the interlocking member via the second biasing means.

2. The throttle grip device according to claim 1, characterized in that the second biasing means is attached, and when the throttle grip rotates forward, it rotates together with the interlocking member and transmits the rotational operation of the throttle grip to the interlocking member via the second biasing means, and when the throttle grip rotates backward, it allows the rotation of the interlocking member and stops by contacting a stopper formed in the case, thereby applying the biasing force of the second biasing means to the interlocking member.

3. The throttle grip device according to claim 2, characterized in that the second biasing means consists of a coil spring attached to the biasing force selection means with one end in contact with a spring receiving portion formed therein, and when the throttle grip rotates in the forward direction, the engaging portion presses against the spring receiving portion to generate a biasing force for the second biasing means.

4. The throttle grip device according to claim 1, further comprising means for providing a resistive force that generates sliding resistance when the interlocking member rotates.

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