Multi-pulse trigger knob structure for fine adjustment of load

Abstract

The invention discloses a multi-pulse trigger knob structure for load fine adjustment, and relates to the technical field of electronic adjusting equipment. The device comprises a shell, a knob cap, a main rotating shaft, a movable contact piece and a static contact piece, the shell is provided with an adjusting cavity with an upward opening, the shell is used for being embedded into an operation table top, the shell is composed of three parts including a base, a trapezoidal shell and an annular shell from bottom to top, and the knob cap is rotationally installed at the opening of the adjusting cavity; the two ends of the knob cap are inserted into the side wall of the adjusting cavity, rotation operation is received through the knob cap, the movable contact piece is driven to rotate through the main rotating shaft, and a plurality of static contact pieces are sequentially touched when the movable contact piece rotates by one circle, so that a plurality of switching value pulse signals are reliably generated, the pulse frequency is determined by the rotation speed, and the switch has the advantages of being simple in structure, fast in response, long in service life, reliable in triggering and the like. The method is suitable for load fine adjustment, parameter adjustment and other scenes needing multi-pulse triggering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic adjustment device, and particularly relates to a multi-pulse trigger knob structure for load fine adjustment. BACKGROUND

[0002] In the field of load fine adjustment application of precision instruments, industrial control consoles, aerospace equipment and the like, a reliable, accurate and mechanical input device is needed to set parameters, and currently, electronic devices are mostly used to replace encoders.

[0003] Although the electronic knob has high precision, it has high cost and is susceptible to electromagnetic interference, and the reliability is reduced in extreme environments. The ordinary potentiometer knob outputs an analog voltage signal, which is susceptible to drift, needs an additional analog-digital conversion circuit, and does not have the characteristics of accurate counting and high-speed response of digital pulses. SUMMARY

[0004] The present application aims to solve the problems that the electronic knob is susceptible to electromagnetic interference and the ordinary potentiometer knob needs an additional analog-digital conversion circuit. Further, a multi-pulse trigger knob structure for load fine adjustment is provided.

[0005] The technical scheme of the present application is: a multi-pulse trigger knob structure for load fine adjustment, comprising: a shell having an adjustment cavity with an opening facing upward, the shell being used for embedding into an operation table top;

[0006] A knob cap is rotatably installed at the opening of the adjustment cavity;

[0007] A main rotating shaft is fixedly installed at the bottom surface of the knob cap and extends downward;

[0008] A moving contact is fixedly installed on the main rotating shaft and extends in a horizontal direction, and the moving contact is electrically connected with a common terminal post;

[0009] A stationary contact is installed in the adjustment cavity, and the stationary contact has a plurality of stationary contacts which are uniformly distributed in a circumferential direction and have the main rotating shaft as a center, the plurality of stationary contacts are located on the rotating path of the moving contact, and the plurality of moving contacts are respectively electrically connected with signal terminal posts, when the moving contact rotates, the moving contact sequentially contacts the plurality of stationary contacts to output pulse signals with different frequencies.

[0010] Further, the knob cap has a first position and a second position, when the knob cap is pressed to move from the first position to the second position, the moving contact moves downward to the horizontal plane where the plurality of stationary contacts are located;

[0011] The knob cap is connected with a first elastic member, and the first elastic member has an elastic force for pushing the knob cap to move from the second position to the first position.

[0012] Further, the side wall of the adjusting cavity is provided with a fixing groove, a fixing disc is rotatably connected in the fixing groove, the main rotating shaft comprises a fixedly connected thick shaft and thin shaft, the thick shaft is located at the upper side, the thin shaft is located at the lower side, and the fixing disc is provided with a avoiding hole for the thin shaft.

[0013] Further, the first elastic member is connected between the bottom wall of the fixing groove and the bottom surface of the fixing disc.

[0014] Further, the first elastic member is a first spring, one end of the first spring is connected with the bottom wall of the fixing groove, the other end of the first spring is connected with the bottom surface of the fixing disc, and the first spring is provided with a plurality of springs uniformly distributed in the circumferential direction.

[0015] Further, the side wall of the adjusting cavity is provided with a supporting groove, a supporting ring is arranged in the supporting groove, the top surface of the supporting ring is connected with the knob cap through a ball, and the main rotating shaft passes through the hollow area on the supporting ring.

[0016] Further, the second spring is further arranged, one end of the second spring is connected with the bottom surface of the supporting ring, the other end of the second spring is connected with the top surface of the fixing disc, and the second spring has a spring force for pushing the supporting ring and the fixing disc away from each other.

[0017] Further, the moving contact is a metal probe rod, a moving contact point is formed through the side surface of the metal probe rod, and the static contact is a metal ball, a first static contact point is formed through the metal ball.

[0018] Further, the metal probe rod is electrically connected with the common terminal post through a metal rotating shaft, and the metal rotating shaft is a telescopic shaft.

[0019] Further, the metal ball is electrically connected with the signal terminal post through an elastic metal sheet, and a second static contact point is formed through the elastic metal sheet.

[0020] Compared with the prior art, the present application has the following effects:

[0021] 1. The multi-pulse trigger knob structure for load fine adjustment provided by the present application can receive a rotating operation through the knob cap, drive the moving contact to rotate through the main rotating shaft, and sequentially touch a plurality of static contacts every rotation, so as to reliably generate a plurality of on-off pulse signals, the pulse frequency is determined by the rotation speed, and the present application has the characteristics of simple structure, fast response, long service life, reliable triggering and the like, and is suitable for scenes requiring multi-pulse triggering, such as load fine adjustment and parameter adjustment.

[0022] 2. The multi-pulse trigger knob structure for load fine adjustment provided by the application is completely mechanical contact on-off, and outputs switch signals, is not sensitive to electromagnetic interference, is suitable for complex electromagnetic environment, can directly generate digital pulses, does not need analog-digital conversion, can be directly interfaced with digital systems such as MCUs, and realizes accurate circle counting and speed measurement.

[0023] 3. The multi-pulse trigger knob structure for load fine adjustment provided by the application integrates all core components in a compact shell, has simple and reliable mechanical structure, is durable, provides soft elastic damping by a spring, and produces clear paragraph feeling when a metal probe rod passes through a metal ball, thereby providing exact operation feedback for a user.

[0024] 4. The multi-pulse trigger knob structure for load fine adjustment provided by the application can judge the rotation direction of the knob by recognizing the sequence of pulses on different terminal posts. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the application;

[0026] Figure 2 is an enlarged view of the A area in Figure 1

[0027] In the figure: 1, shell; 2, adjustment cavity; 3, knob cap; 4, main rotating shaft; 5, moving contact; 6, stationary contact; 7, first elastic member; 8, fixed disc; 9, coarse shaft; 10, fine shaft; 11, support ring; 12, ball; 13, second spring; 14, metal rotating shaft; 15, elastic metal sheet. DETAILED DESCRIPTION

[0028] Specific implementation one: in combination with Figure 1 , Figure 2 ​The embodiment is described as follows. The embodiment comprises a shell 1, a knob cap 3, a main rotating shaft 4, a moving contact 5 and a static contact 6. The shell 1 has an upward opening adjusting cavity 2, and is embedded into an operation table top. The shell 1 is composed of three parts, including a base, a trapezoidal shell and a ring-shaped shell from bottom to top. The knob cap 3 is rotatably installed at the opening of the adjusting cavity 2, and the two ends of the knob cap 3 are inserted into the side wall of the adjusting cavity 2. The side wall at the outlet of the adjusting cavity 2 is inwardly recessed, and cooperates with the knob cap 3 to prevent the knob cap 3 from being separated. The main rotating shaft 4 is fixedly installed at the bottom surface of the knob cap 3 and extends downward. The main rotating shaft 4 is located at the middle position of the bottom surface of the knob cap 3. The moving contact 5 is fixedly installed on the main rotating shaft 4 and extends in the horizontal direction. The moving contact 5 is electrically connected with a common terminal post. The static contact 6 is installed in the adjusting cavity 2. The static contact 6 has a plurality of static contacts 6 which are uniformly distributed in the circumferential direction and take the main rotating shaft 4 as the center. The plurality of static contacts 6 are located on the rotating path of the moving contact 5. The plurality of moving contacts 5 are respectively electrically connected with signal terminal posts. When the moving contact 5 rotates, the moving contact 5 sequentially contacts the plurality of static contacts 6 to output pulse signals with different frequencies.

[0029] The multi-pulse trigger knob structure for load fine adjustment of the embodiment receives a rotating operation through the knob cap 3, drives the moving contact 5 to rotate through the main rotating shaft 4, and sequentially touches the plurality of static contacts 6 every rotation, so as to reliably generate a plurality of on-off pulse signals. The pulse frequency is determined by the rotating speed. The structure is simple, the response is fast, the service life is long, the triggering is reliable, and the structure is suitable for scenes requiring multi-pulse triggering, such as load fine adjustment and parameter adjustment.

[0030] Specific implementation method two: in combination with Figure 1 , Figure 2 The embodiment is described as follows. The embodiment is different from the specific implementation method one in that the knob cap 3 has a first position and a second position. When the knob cap 3 is pressed to move from the first position to the second position, the moving contact 5 moves downward into the horizontal plane where the plurality of static contacts 6 are located. The knob cap 3 is connected with a first elastic member 7. The first elastic member 7 has an elastic force for pushing the knob cap 3 to move from the second position to the first position. Only when the knob cap 3 rotates at the second position, the moving contact 5 can contact the static contact 6, so as to realize the connection of the circuit. Before use, the knob cap 3 needs to be pressed downward. This design can prevent accidental contact. The other components and connection relationships are the same as those of the specific implementation method one.

[0031] Specific implementation method three: in combination with Figure 1 , Figure 2The difference between the embodiment and the second specific embodiment is that the side wall of the adjusting cavity 2 is provided with a fixing groove, a fixing disc 8 is rotatably connected in the fixing groove, the main rotating shaft 4 comprises a fixedly connected thick shaft 9 and a thin shaft 10, the thick shaft 9 is located at the upper portion, the thin shaft 10 is located at the lower portion, the fixing disc 8 is provided with a position avoiding hole for passing through the thin shaft 10, when the knob cap 3 is pressed downward, the knob cap 3 drives the main rotating shaft 4 to move, when the bottom surface of the thick shaft 9 part on the main rotating shaft 4 abuts against the fixing disc 8, the fixing disc 8 is pushed to move downward, the fixing disc 8 supports the thin shaft 10 to ensure the stability during rotation. The other components and connection relationship are the same as those in the second specific embodiment.

[0032] The fourth specific embodiment is combined with the third specific embodiment. Figure 1 , Figure 2 The difference between the embodiment and the third specific embodiment is that the first elastic member 7 is connected between the bottom wall of the fixing groove and the bottom surface of the fixing disc 8, when the fixing disc 8 moves downward, the first elastic member 7 is compressed, after the user releases the knob cap 3, the first elastic member 7 pushes the fixing disc 8 to move upward, the fixing disc 8 pushes the bottom surface of the thick shaft 9, and then pushes the main rotating shaft 4 to reset. The other components and connection relationship are the same as those in the third specific embodiment.

[0033] The fifth specific embodiment is combined with the fourth specific embodiment. Figure 1 , Figure 2 The difference between the embodiment and the fourth specific embodiment is that the first elastic member 7 is a first spring, one end of the first spring is connected with the bottom wall of the fixing groove, the other end of the first spring is connected with the bottom surface of the fixing disc 8, the first spring has a plurality of springs which are uniformly distributed in the circumferential direction, the deformation and the stress of the spring are in a stable linear relationship within the elastic limit, the force value required can be accurately matched by designing parameters (wire diameter, number of turns, material), and the precise fine adjustment scene is adapted. The other components and connection relationship are the same as those in the fourth specific embodiment.

[0034] The sixth specific embodiment is combined with the third specific embodiment. Figure 1 , Figure 2 The difference between the embodiment and the third specific embodiment is that the side wall of the adjusting cavity 2 is provided with a support groove, a support ring 11 is arranged in the support groove, the top surface of the support ring 11 is connected with the knob cap 3 through a plurality of rolling balls 12, the main rotating shaft 4 passes through the hollow area on the support ring 11, specifically, the rolling balls 12 are embedded in the top surface of the support ring 11, the rolling balls 12 are uniformly distributed in the circumferential direction, the bottom surface of the knob cap 3 is provided with an annular groove, the annular groove and the rolling balls 12 are matched to realize the rotary installation of the knob cap 3, and the matching friction force of the rolling balls 12 is small, so that the knob cap 3 is convenient to rotate. The other components and connection relationship are the same as those in the third specific embodiment.

[0035] The seventh specific embodiment is combined with the third specific embodiment. Figure 1 , Figure 2This embodiment differs from Specific Embodiment Six in that it further includes a second spring 13, one end of which is connected to the bottom surface of the support ring 11, and the other end of which is connected to the top surface of the fixed disk 8. The second spring 13 has an elastic force that pushes the support ring 11 and the fixed disk 8 away from each other. The second spring 13 can provide both preload and elastic damping for user operation. Other components and connections are the same as in Specific Embodiment Six.

[0036] Specific implementation method eight: Combination Figure 1 , Figure 2 This embodiment differs from specific embodiment one in that the moving contact 5 is a metal probe, forming a moving contact point through its side, and the stationary contact 6 is a metal ball, forming a first stationary contact point. The metal probe provides rigid linear guidance, ensuring that the force is transmitted in a fixed direction. The spherical structure of the metal ball keeps the contact point concentrated, avoiding force dispersion due to contact angle deviations and improving the accuracy of fine-tuning parameters. The metal ball and metal probe have point contact, resulting in low friction and reduced wear on both sides, maintaining stable accuracy even after long-term use. Other components and connections are the same as in any of specific embodiments one through seven.

[0037] Specific Implementation Method Nine: Combining Figure 1 , Figure 2 This embodiment differs from Specific Embodiment Eight in that the metal probe is electrically connected to the common terminal via a metal shaft 14. The metal shaft 14 is a telescopic shaft, with one end connected to the metal probe and the other end connected to the common terminal. The portion of the metal shaft 14 used for connecting to the metal probe is telescopic. The main shaft 4 is insulated. The metal shaft 14 can transmit signals and also supports the metal probe. Other components and connections are the same as in Specific Embodiment Eight.

[0038] Specific Implementation Method Ten: Combining Figure 1 , Figure 2 This embodiment differs from specific embodiment eight in that the metal ball is electrically connected to the signal terminal terminal via an elastic metal sheet 15, forming a second stationary contact. When the user rotates the cap, the metal probe rotates accordingly. When the metal probe reaches a position where it contacts a metal ball, it compresses the ball, causing it to overcome the elastic force of the elastic metal sheet 15 and move backward. This creates a clear, tactile feedback as the metal probe passes over the metal ball, providing the user with precise operational feedback. Other components and connections are the same as in specific embodiment eight.

[0039] How to use this implementation method:

[0040] The user first presses the knob cap 3, the knob cap 3 is sequentially moved downwardly against the elastic force of the second spring 13 and the first spring, the knob cap 3 drives the main rotating shaft 4 and the metal probe to move together, then the knob cap 3 is rotated, the knob cap 3 drives the main rotating shaft 4 and the metal probe to rotate together, when the metal probe contacts with each metal ball, a pulse electric signal is generated between the corresponding two connecting posts, after the metal probe rotates through the metal ball, the circuit is closed.

[0041] The present application is not limited to the above-mentioned embodiments, and the purpose of the present application can also be achieved by combining one or several specific embodiments.

Claims

1. A multi-pulse triggered knob structure for load fine-tuning, characterized in that, include: The outer casing (1) has an upward-facing adjustment cavity (2), and the outer casing (1) is used to be embedded in the operating table surface; The knob cap (3) is rotatably installed at the opening of the adjustment cavity (2); The main rotating shaft (4) is fixedly installed on the bottom surface of the knob cap (3) and extends downward; The movable contact (5) is fixedly installed on the main rotating shaft (4) and extends horizontally. The movable contact (5) is electrically connected to the common terminal. A stationary contact (6) is installed in the adjustment cavity (2). The stationary contact (6) has multiple components evenly distributed circumferentially around the main rotating shaft (4). The multiple stationary contacts (6) are all located on the rotation path of the moving contact (5). The multiple moving contacts (5) are electrically connected to the signal terminal terminals respectively. When the moving contact (5) rotates, it contacts the multiple stationary contacts (6) in sequence to output pulse signals of different frequencies.

2. The multi-pulse trigger knob structure for load fine-tuning according to claim 1, characterized in that, The knob cap (3) has a first position and a second position. When the knob cap (3) is pressed to move from the first position to the second position, the moving contact (5) moves downward to the horizontal plane where the plurality of stationary contacts (6) are located. The knob cap (3) is connected to the first elastic member (7), which has an elastic force that pushes the knob cap (3) from the second position to the first position.

3. The multi-pulse trigger knob structure for load fine-tuning according to claim 2, characterized in that, The side wall of the adjustment cavity (2) has a fixing groove, and a fixing disk (8) is rotatably connected in the fixing groove. The main rotating shaft (4) includes a thick shaft (9) and a thin shaft (10) fixedly connected. The thick shaft (9) is located above and the thin shaft (10) is located below. The fixing disk (8) has a clearance hole for the thin shaft (10) to pass through.

4. The multi-pulse trigger knob structure for load fine-tuning according to claim 3, characterized in that, The first elastic element (7) is connected between the bottom wall of the fixed groove and the bottom surface of the fixed plate (8).

5. The multi-pulse trigger knob structure for load fine-tuning according to claim 4, characterized in that, The first elastic element (7) is a first spring. One end of the first spring is connected to the bottom wall of the fixing groove, and the other end of the first spring is connected to the bottom surface of the fixing plate (8). The first spring has a plurality of springs evenly distributed along the circumference.

6. The multi-pulse trigger knob structure for load fine-tuning according to claim 3, characterized in that, The side wall of the adjustment cavity (2) has a support groove, and a support ring (11) is provided in the support groove. The top surface of the support ring (11) is connected to the knob cap (3) through a ball bearing (12). The main rotating shaft (4) passes through the hollow area on the support ring (11).

7. The multi-pulse trigger knob structure for load fine-tuning according to claim 6, characterized in that, Also includes: The second spring (13) has one end connected to the bottom surface of the support ring (11) and the other end connected to the top surface of the fixed disk (8). The second spring (13) has an elastic force that pushes the support ring (11) and the fixed disk (8) away from each other.

8. A multi-pulse trigger knob structure for load fine-tuning according to any one of claims 1-7, characterized in that, The moving contact (5) is a metal probe, and a moving contact point is formed through the side of the metal probe. The stationary contact (6) is a metal ball, and a first stationary contact point is formed through the metal ball.

9. A multi-pulse triggered knob structure for load fine-tuning according to claim 8, characterized in that, The metal probe is electrically connected to the common terminal block via a metal shaft (14), which is a telescopic shaft.

10. A multi-pulse triggered knob structure for load fine-tuning according to claim 8, characterized in that, The metal ball is electrically connected to the signal terminal terminal via an elastic metal sheet (15), forming a second stationary contact via the elastic metal sheet (15).

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