Measuring scale device

Abstract

The utility model relates to a measuring scale device, and the device comprises a graduated scale which can move in a first direction, and is provided with uniformly distributed stripes; and the stripe sensor is a reflective optocoupler sensor, is arranged on the motion path of the graduated scale, and can sense the stripes when the graduated scale moves. The measuring scale device at least has the characteristic of automatic reading.

Description

Technical Field

[0001] The present disclosure relates to the field of machinery. Specifically, the present disclosure relates to a measuring ruler device. Background Art

[0002] The measurement of length is a common requirement in both the life and industrial fields. Manual measurement is a conventional method. However, after manually measuring the length, manual reading is required, and often, the measured data needs to be manually input into various devices. The operation is not simple and convenient enough and is prone to errors. Therefore, there is a need to provide a measuring ruler device that can automatically generate readings. Further, the reading can be automatically transmitted to the required devices, making the operation convenient and reliable and saving operation time. Summary of the Utility Model

[0003] In view of this, the present disclosure provides a measuring ruler that can automatically give readings.

[0004] According to an exemplary embodiment of the present disclosure, a measuring ruler device is characterized by comprising: a scale, which can move along a first direction and has evenly distributed stripes thereon; a stripe sensor, which is a reflective optocoupler sensor, is arranged on the movement path of the scale and can sense the stripes when the scale moves.

[0005] According to an exemplary embodiment of the present disclosure, it further comprises a scale box. The scale is a tape measure and can be stored in the scale box. The scale box provides a recovery force for recovering the scale into the scale box, and the stripe sensor is fixedly connected to the scale box.

[0006] According to an exemplary embodiment of the present disclosure, it further comprises a zero position switch, which is triggered when the scale is fully retracted.

[0007] According to an exemplary embodiment of the present disclosure, the zero position switch is a transmissive optocoupler sensor. The end of the scale has a baffle, and when the scale is fully retracted, the baffle blocks the transmitting end or the receiving end of the zero position switch.

[0008] According to an exemplary embodiment of the present disclosure, the zero position switch is a transmissive optocoupler. The measuring ruler device further comprises: a scale support frame, which is fixedly connected to the scale box, and the movement path of the scale passes through the inside of the scale support frame; a reset spring piece, which is connected to the scale support frame. In response to the scale being fully recovered into the scale box, the recovery force causes the end of the scale to squeeze the reset spring piece, so that a part of the reset spring piece blocks the transmitting end or the receiving end of the zero position switch.

[0009] According to an exemplary embodiment of the present disclosure, it further includes: a return spring, one end of the return spring is connected to the return elastic piece and is located between the return elastic piece and the scale box, in response to the scale being completely retracted into the scale box, the return elastic piece and the scale box squeeze the return spring.

[0010] According to an exemplary embodiment of the present disclosure, it further includes: a return cap, connected to the other end of the return spring, in response to the return elastic piece and the return spring both being in a free state, there is a specific distance greater than zero between the return cap and the measuring scale box; a trigger rivet, connected to the return elastic piece and located between the return elastic piece and the end of the scale, in response to the scale being in a completely retracted state, the end of the scale contacts the trigger rivet and squeezes the return elastic piece through the trigger rivet.

[0011] According to an exemplary embodiment of the present disclosure, the measuring scale device includes three states, wherein: the first state, in the first state the measuring scale is not completely retracted, the return elastic piece and the return spring are both in a free state, and the 0-position switch is not blocked; the second state, in the second state the measuring scale is retracted from the non-retracted state to the measuring scale box under the action of the retracting force, under the impact of the end of the measuring scale, the return elastic piece and the return spring are both in a stressed state, and the 0-position switch is blocked; the third state, in the third state the measuring scale is stably in a completely retracted state under the action of the retracting force, the return elastic piece is in a stressed state, the return spring is in a free state, and the 0-position switch is blocked.

[0012] According to an exemplary embodiment of the present disclosure, it further includes a data interface to transmit measurement data to an external device.

[0013] According to an exemplary embodiment of the present disclosure, the external device is an X-ray machine, and the measuring scale device is used to measure the original image distance.

[0014] Through the embodiments of the present disclosure, the measuring scale device at least has the function of automatically generating readings. Description of the Drawings

[0015] The following will make the above and other features and advantages of the present utility model clearer to those of ordinary skill in the art by describing the preferred embodiments of the present utility model in detail with reference to the drawings, in which:

[0016] Figure 1 is a schematic structural diagram of an exemplary measuring device of the present disclosure;

[0017] Figure 2 is a three-dimensional schematic diagram of components related to zero-position triggering of an exemplary measuring device of the present disclosure;

[0018] Figure 3 Schematic diagram of the first state of the zero-position triggering process of the measurement device according to this disclosure;

[0019] Figure 4 Schematic diagram of the second state of the zero-position triggering process of the measurement device according to this disclosure;

[0020] Figure 5 Schematic diagram of the third state of the zero-position triggering process of the measurement device according to this disclosure.

[0021] Among them, the reference numerals are as follows:

[0022] 1 Scale box 2 Zero-position switch 3 Scale support frame 4 Reset shrapnel 5 Reset cap 6 Reset spring 7 Trigger rivet 8 Scale Specific embodiments

[0023] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following examples are given to further elaborate on this disclosure in detail. It should be understood that the specific embodiments described herein are only used to illustrate and explain this disclosure, and are not used to limit this disclosure.

[0024] In an exemplary embodiment, a measuring scale device of this disclosure includes a scale with uniformly distributed stripes thereon, and the scale can move along a first direction; it further includes a stripe sensor, which can be a reflective optocoupler sensor, arranged on the movement path of the scale, and can sense the number of stripes when the scale moves along the first direction. In this way, by counting the number of stripes, the length of the movement of the scale can be known, and thus the value of the distance can be directly obtained. In actual use, the scale may move in the first direction and the direction opposite to the first direction. When moving along the first direction, the distance increases, while when moving in the direction opposite to the first direction, the distance decreases. To be able to identify this difference in direction, one method is to use two reflective optocoupler sensors, arranged front and back along the first direction, and make the distance between the two optocouplers small enough so that the order in which the two optocouplers sense the stripes can infer the movement direction of the scale. Another way is to use another sensor to sense the movement direction of the scale. For example, if the scale is a tape measure, the rotation direction of the tape measure shaft can be sensed. In actual use, the user pulls the end of the scale from the measurement starting point to the position to be measured. By sensing the movement direction of the scale and the number of stripes in that direction, the distance moved by the scale can be known, and this distance is the distance to be measured.

[0025] In an exemplary embodiment, the scale is a tape measure, and the tape measure is housed in a scale case. The scale case also provides a restoring force to retract the scale into the scale case. In this way, when the scale is not subjected to an outward pulling force, it will be completely retracted into the scale case. When the scale is pulled out, the scale moves relative to the scale case. The stripe sensor and the scale case are fixedly connected (this fixed connection can be a direct connection or a connection through other components, as long as the positions of the stripe sensor and the scale case are relatively fixed). In this way, the movement of the scale relative to the scale case can be sensed.

[0026] In an exemplary embodiment, although the stripe sensor can sense the movement in two directions, the accumulation of errors is inevitable. Therefore, a zero position switch is further included. When the scale is completely retracted, the zero position switch is triggered and the count is reset to zero. In this way, before each measurement, the data is equivalent to being recalibrated. Here, the zero position switch can be a pressure sensor. When the scale is completely retracted, its end can contact the pressure sensor with a pressure of at least the restoring force to trigger the zero position switch to reset to zero.

[0027] In an exemplary embodiment, the zero position switch is a transmissive opto-coupler sensor, and the end of the scale has a baffle. When the scale is completely retracted, the baffle blocks the transmitting end or the receiving end of the transmissive opto-coupler sensor to trigger the zero position switch to reset to zero.

[0028] In an exemplary embodiment, the measuring scale device further includes a scale support frame and a reset spring piece. The scale support frame is fixedly connected to the scale box, and the movement path of the scale passes through the inside of the scale support frame. The reset spring piece is fixedly connected to the scale support frame. When the scale is fully retracted into the scale box, the retraction force provided by the scale box causes the end of the scale to press against the reset spring piece (for example, one end of the reset spring piece is fixedly connected to the scale box, and the other end is a free end, and the end of the scale presses against this free end), so that a part of the reset spring piece blocks the emitting end or the receiving end of the transmissive opto-coupler sensor, triggering the 0-position switch to zero (for example, the reset spring piece includes a baffle, which is arranged at the free end of the reset spring piece and extends towards the transmissive opto-coupler sensor. When the reset spring piece is subjected to a pressure of the retraction force magnitude, the baffle can move to a position where it blocks the transmissive opto-coupler sensor). Further, the measuring scale device also includes a reset spring. One end of the reset spring is connected to the reset spring piece (for example, fixedly connected to the free end of the reset spring piece), and is located between the reset spring piece and the scale box, and a reset cap is provided at the other end (this reset cap is not necessary, and the reset spring can also be in direct contact with the scale box). When the scale is fully retracted into the scale box, due to the retraction force and the impact force of the scale, the reset spring piece and the scale box will press against the reset spring, and the reset spring will provide further buffering. More preferably, when neither the reset spring piece nor the reset spring is subjected to the pressure of the scale and is in a free state, the reset cap and the measuring scale box have a specific distance greater than zero. In this way, the measuring scale device includes three states: The first state is that the measuring scale is not fully retracted, and it does not apply force to the reset spring piece and the reset spring. Both the reset spring piece and the reset spring are in a free state, and at this time, the 0-position switch is not blocked; The second state is that the measuring scale is retracted from the non-retracted state to the measuring scale box under the action of the retraction force. Under the impact of the end of the measuring scale, both the reset spring piece and the reset spring are in a stressed state, and the 0-position switch is blocked, triggering zeroing; The third state is that the measuring scale is stably in the fully retracted state under the action of the retraction force. The reset spring piece is in a stressed state, the reset spring is in a free state, and the 0-position switch is blocked, triggering zeroing. This two-stage buffering is beneficial to the protection and zero-position triggering of the scale device. If only a spring piece is used, when the scale is retracted at a high speed and impacts the reset spring piece, the elastic deformation is likely to be too large, hitting the 0-position switch. However, with two-stage buffering, the reset spring can further provide a buffering force, thereby reducing the overall deformation during buffering. This is very beneficial to the overall design of the system. A large deformation means a large volume, and the layout of the components of the system is relatively difficult, while a small deformation design is relatively simple.In addition, a trigger rivet can be provided on the reset elastic piece, which is located between the reset elastic piece and the end of the scale. When the scale is converted from the non-recovered state to the fully recovered state, the scale impacts the trigger rivet. When the scale is stably in the fully recovered state, the end of the scale contacts the trigger rivet, that is, the scale squeezes the reset elastic piece through the trigger rivet.

[0029] In an exemplary embodiment, the measuring scale device further includes a data interface for transmitting measurement data to an external device. In this way, after automatically obtaining the distance reading, it is not necessary to manually input the reading on the required external device. This data interface can be wired or wireless, which is not limited herein.

[0030] In an exemplary embodiment, specifically taking the measuring scale for measuring the original image distance (SID, source to image receptor distance) during X-ray examination as an example for illustration. When the X-ray machine takes a picture of the human body, the doctor needs to obtain the original image distance. This parameter is very important for the imaging effect of X-rays and is a key photography parameter. One way is that a manual tape measure is equipped on the X-ray machine. The doctor needs to manually measure the original image distance with the tape measure and set the original image distance parameter into the X-ray system. This operation is relatively cumbersome. And frequently pulling the tape measure and the tape measure rebounding, after a certain period of time, the tape measure is very likely to be damaged. Therefore, this embodiment provides an intelligent device to obtain the original image distance. At the same time, because of the importance of the original image distance, the measuring device must be reliable and accurate enough. This embodiment does not adopt non-contact measuring devices such as ultrasonic or laser rangefinders. The measurement errors of such measuring devices are relatively large and are very susceptible to interference. In addition, the thickness and material of the patient's clothing may also affect the measurement of such devices and result in inaccurate results.

[0031] See specifically Figure 1 , the SID measuring device in this embodiment includes a scale box 1, a 0-position switch 2, a scale support frame 3, a reset elastic piece 4, a reset cap 5, a reset spring 6, a trigger rivet 7, and a scale 8. Among them, the 0-position switch 2 is a transmissive optocoupler, and the scale 8 is equipped with a corresponding reflective optocoupler (not shown). The scale 8 is a tape measure. When the scale 8 is pulled, the black and white stripes on it move at the reflective optocoupler, and the reflective optocoupler generates digital signal pulses. The host computer (not shown) calculates the accurate distance pulled by the scale 8 through pulse counting and the distance between the black and white stripes. On the moving path of the scale, the combination of two optocouplers before and after is used, and the relationship between the distance between the two optocouplers and the distance between the black and white stripes is reasonably set to realize the function of increasing the value when the tape measure is pulled out and decreasing the value when the tape measure is retracted, and can also multiply the frequency to increase the measurement accuracy.

[0032] See specifically Figure 1-2, for measurement accuracy, a zero - position detection function is designed. When the scale 8 is retracted into the X - ray machine, the scale 8 will trigger the zero - position switch 2, and the displacement distance will be automatically set to zero. This zero - position detection function is realized by using a reset spring piece 4 with a reset spring 6, a zero - position switch 2, and a trigger rivet 7. While ensuring zero - position triggering, the reset spring piece 4 can buffer the retraction of the scale 8, increasing the service life of the tape measure. See specifically Figures 3-5 , Figures 3-5 shows the detailed triggering and buffering process. First, see Figure 3 , when the doctor uses the scale 8, the scale 8 is pulled out. The transmissive optocoupler of the zero - position switch 2 is not covered by the reset spring piece 4, and the reflective optocoupler starts to count and feedback the length of the scale 8 pulled out. Then see Figure 4 , when the doctor finishes using the scale 8 and releases the scale 8, the scale 8 starts to retract at high speed. When it touches the trigger rivet 7, because of its high speed, the reset spring 6 directly contacts the scale box through the reset cap 5, compressing the reset spring 6 to buffer the force of the scale 8. Finally, see Figure 5 , when the force buffering is completed, the force during the natural retraction of the scale 8 is not enough to resist the elastic force of the reset spring 6, but the force during the natural retraction is enough to cause the reset spring piece 4 to deform and cover the zero - position switch 2, triggering the zero - position. The reset spring piece with a reset spring realizes two functions in design. Facing the strong impact during the retraction of the scale, the reset spring plays the majority of the buffering role. When the retraction force is buffered, the retraction force of the scale is very small. At this time, the reset spring piece is relied on to trigger the zero - position detection.

[0033] The specific embodiments of the present disclosure have at least the following characteristics:

[0034] Along with the doctor's operation of pulling out the scale, the scale value will be automatically synchronized to the X - ray machine, greatly facilitating the doctor's operation (when the reading needs to be transmitted to the X - ray machine, an operation is usually required, such as pressing a certain switch, then recording the reading at this moment and transmitting it to the X - ray machine. If the reading is only provided to the display screen, this operation is not required, and it can be designed that the display screen always shows the reading at the moment when the scale is pulled).

[0035] The functions of tape measure displacement measurement and zero - position detection can be realized on a single PCB board, which is convenient for mass production and assembly and has high reliability.

[0036] In the present disclosure, directional terms such as "upper", "lower", "left", and "right" are merely exemplary relative directions in the drawings and do not represent the direction of gravity in the state of use. In addition, the terms "first", "second", etc. used in the present disclosure are for distinguishing one element from another and do not have order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as a limitation on the present disclosure. In addition, the nouns and pronouns related to people in the present disclosure are not limited to specific genders.

[0037] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0038] To make the drawings concise, only the parts related to the present disclosure are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, for components with the same structure or function in some drawings, only one of them is schematically shown, or only one of them is labeled.

[0039] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A measuring ruler device, characterized in that: include: a scale, movable along a first direction, and having uniformly distributed stripes thereon; The stripe sensor is a reflective optical coupling sensor, which is arranged on the movement path of the scale and can sense the stripes when the scale moves.

2. The measuring ruler device according to claim 1, characterized in that: It also includes a scale box, the scale is a tape measure, which can be stored in the scale box, the scale box provides a recovery force to recover the scale into the scale box, and the fringe sensor is fixedly connected to the scale box.

3. The measuring ruler device according to claim 2, characterized in that: A 0-position switch is also included, and when the scale is fully retracted, the 0-position switch is triggered.

4. The measuring ruler device according to claim 3, characterized in that: The 0-position switch is a through-beam optical coupling sensor, and a baffle is provided at the end of the scale. When the scale is fully retracted, the baffle blocks the transmitting end or the receiving end of the 0-position switch.

5. The measuring ruler device according to claim 3, characterized in that: The 0-position switch is a through-beam optical coupler, and the measuring ruler device further comprises: A scale support frame, fixedly connected to the scale box, and a movement path of the scale passes through the interior of the scale support frame; A reset spring is connected to the scale support frame. In response to the scale being completely retracted into the scale box, the retraction force causes the end of the scale to squeeze the reset spring so that a portion of the reset spring blocks the transmitting end or the receiving end of the 0-position switch.

6. The measuring ruler device according to claim 5, characterized in that include: A return spring, one end of which is connected to the return spring and is located between the return spring and the scale box. In response to the scale being completely recovered into the scale box, the return spring is squeezed by the return spring and the scale box.

7. The measuring ruler device according to claim 6, characterized in that include: A reset cap is connected to the other end of the reset spring, and in response to the reset spring and the reset spring being in a free state, the reset cap and the scale box have a specific distance greater than zero; A trigger rivet is connected to the reset spring and is located between the reset spring and the end of the scale. In response to the scale being in a fully retracted state, the end of the scale contacts the trigger rivet and squeezes the reset spring through the trigger rivet.

8. The measuring ruler device according to claim 7, characterized in that: The measuring ruler device includes three states, wherein: a first state, in which the measuring ruler is not completely retracted, the reset spring and the reset spring are both in a free state, and the 0-position switch is not blocked; a second state, in which the measuring ruler is recovered from the unrecovered state to the scale box under the action of the recovery force, and under the impact of the end of the measuring ruler, the reset spring and the reset spring are both in a stressed state, and the 0-position switch is blocked; The third state, in which the measuring ruler is stably in a fully recovered state under the action of the recovery force, the reset spring is in a stressed state, the reset spring is in a free state, and the 0-position switch is blocked.

9. The measuring ruler device according to claim 1, characterized in that: A data interface is also included to transmit the measurement data to an external device.

10. The measuring ruler device according to claim 9, characterized in that: The external device is an X-ray machine, and the measuring ruler device is used to measure the original image distance.

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