Measurement setting device

Abstract

A measurement setting device comprises a cylindrical shell 1, fixed teeth 51 fixed with the shell 1, at least one sleeve 2 capable of rotating on the shell 1, a graduated scale 23 arranged on the sleeve 2, a protective cover 6 with inner teeth capable of being meshed with outer teeth 21 of the sleeve and the fixed teeth 51 at the same time so as to lock the sleeve 2, the protective cover 6 is provided with at least two positioning clamping grooves 10 on the shell 1, the inner wall of the protective cover 6 is provided with corresponding bosses or grooves matched with the clamping grooves 10, and the protective cover 6 is separated from the fixed teeth 51 and is meshed with the sleeve 2 at the position of at least one clamping groove 10, so that the sleeve 2 can be driven to rotate, but the protective cover 6 cannot axially move; the graduated scale 23 is provided with two groups of scale values and pointers with staggered phases; and a light-transmitting action indication ring 7 is arranged on the shell 1.

Description

Technical Field

[0001] The present invention relates to a measurement setting device, in particular to a parameter setting device for process measurement sensors such as pressure, temperature, flow, speed, distance, position, etc. The device has a cylindrical shell and adopts a sleeve with a scale to set and indicate parameter values. Background Art

[0002] Setting parameter values for measuring devices, such as upper and lower limits, and alarm levels for sensors, can be done using a combination of buttons and digital displays, or by using a graduated dial knob. Using a graduated dial knob is intuitive and convenient, allowing for viewing and setting even when power is off. This invention provides a setting device that utilizes a graduated sleeve.

[0003] U.S. Patent No. 7,062,950 B2 discloses a measuring device with a graduated sleeve mounted on a cylindrical housing. Rotating the graduated sleeve drives a gear, which in turn drives a potentiometer shaft, to set a parameter. A locking sleeve is mounted on the outside of the graduated sleeve. The sleeve has internal teeth or grooves that partially mesh with fixed teeth on the housing and partially with teeth on a graduated dial. When the locking sleeve engages both the fixed teeth and the dial, the dial cannot be rotated. Removing the locking sleeve allows manual rotation of the dial.

[0004] In actual use, this device may have the following problems. 1) During operation, the locking sleeve needs to be removed first, and then the scale sleeve needs to be rotated by hand, which can easily dirty the scale sleeve; the locking sleeve cannot always cover the scale sleeve, and the scale sleeve is also easily contaminated with oil. 2) The scale itself has no lighting, and it is difficult to read in poor light or when the dial is dirty. 3) Because the device is cylindrical, only half of the circumference can be seen in one direction. After being tightened to the equipment through a threaded joint, the scale pointer may accidentally fall into a blind spot, and the value pointed by the pointer cannot be seen. 4) Existing devices of this type usually have a small hole in the shell as an action indicator window, which is sometimes inconvenient to observe due to obstruction of the installation space. Summary of the Invention

[0005] To solve the above problems, the present invention provides a setting device, which takes the following measures:

[0006] The device has a cylindrical housing with a fixed ring having fixed teeth on the housing. The fixed ring is fixed relative to the housing, and there is a scale pointer on the fixed ring. On one side or both sides of the fixed ring, there is one or more sleeves with external teeth and scales. There is a transparent multi-functional protective cover outside the fixed ring and the sleeves. The protective cover has segmented internal teeth that can mesh with the external teeth of the fixed ring and the sleeves. The protective cover has multiple positioning slot stop positions on the housing. There are small bosses or grooves arranged in a circumferential manner on the inner wall of the protective cover that cooperate with the slots on the housing, so that the protective cover can be axially pushed and pulled to be positioned at multiple stop positions. At different stop positions, different sleeves can be driven to rotate or locked respectively. No matter which position it is in, the protective cover will not break away from the covered sleeves and always plays a protective role. The positioning method of the protective cover on the housing adopts slots or stop steps.

[0007] When the protective cover is in the middle slot position, the internal teeth of the protective cover are all in mesh with the external teeth of the sleeves on both sides and the external teeth of the fixed ring. The sleeves on both sides are locked and cannot rotate. When the protective cover is pushed to the left, the internal teeth of the protective cover remain in mesh with the external teeth of the left sleeve, and at the same time are disengaged from the external teeth of the fixed ring and the right sleeve. At this time, rotating the protective cover can drive the left sleeve to rotate. When the protective cover is pulled to the right, the internal teeth of the protective cover remain in mesh with the external teeth of the right sleeve, and at the same time are disengaged from the external teeth of the fixed ring and the left sleeve. At this time, rotating the protective cover can drive the right sleeve to rotate. On the contrary, if the idle stroke part where the internal teeth of the protective cover mesh with the sleeves is arranged outside the external teeth of the sleeves, it becomes that when pushed to the left, the right side meshes, and when pulled to the right, the left side meshes.

[0008] In order to reduce the occlusion of the scale by the internal tooth shape on the protective cover, an interval arrangement measure is taken for its internal tooth array; it can be arranged with sparse single teeth, or arranged with small concentration and large intervals.

[0009] The outer circumferential surface of the protective cover is partially made into a convex-concave surface for easy hand-held operation and to prevent slipping.

[0010] In order to further improve the protection level, sealing rings are provided at one end or both ends of the protective sleeve.

[0011] As above, the locking sleeve becomes a three-functional protective cover. One is the locking function, the second is the comprehensive protection function, and the third is the rotating operation handle.

[0012] In order to facilitate observing the scales on the sleeves, the fixed ring is made of a light-transmitting material. Below or inside the fixed ring, lighting light-emitting tubes are used, which can illuminate the scale disk through the fixed ring. The scale disk can be made of a light-transmitting material, so that there is not only reflected light illumination but also transmitted light illumination for the scales. This solves the problem of unclear scales when the light is insufficient.

[0013] To solve the problem of the blind area caused by the installation orientation of the dial, so that the scale pointer can be seen on both sides of the cylindrical shell, a set of offset pointers and scale values are added opposite to the circumference of the basic scale pointer. That is to say, there are two sets of scale values for the same scale, which are used for observation from both sides of the cylinder respectively. Although the positions of these two scale pointers are different, the values they point to are the same and synchronous, because the two sets of corresponding scale values have the same phase difference. These two sets of scale values can be distinguished by different colors, fonts, orientations, etc.

[0014] To make the action indicator light of the device easy to observe, a transparent action indicator ring is adopted to guide the light of the action indicator light to the entire action indicator ring, so that it can be seen from all directions. In this way, the disadvantage of inconvenient observation of the small-hole indicator light is solved. Brief Description of the Drawings

[0015] Figure 1 is the schematic diagram of the overall structure of the present invention;

[0016] Among them, 1 - housing; 2 - sleeve; 21 - external teeth of the sleeve; 22 - light-transmitting layer; 23 - scale; 2' - right sleeve; 21' - external teeth of the right sleeve; 22' - right light-transmitting layer; 23' - right scale; 3 - gear; 4 - potentiometer; 4' - right potentiometer; 5 - fixing ring; 51 - fixing teeth; 6 - protective cover; 61 - concave-convex pattern; 62 - left internal teeth; 63 - middle internal teeth; 64 - right internal teeth; 65 - boss; 7 - action indicator ring; 8 - wire outlet socket; 9 - sensing joint; 10 - card slot; 11 - lighting light-emitting diode; 12 - action indicating light-emitting diode; 13 - sealing ring.

[0017] Figure 2 is an example of the protective cover 6;

[0018] Among them, 6 - protective cover; 61 - concave-convex pattern; 62 - left internal teeth; 63 - middle internal teeth; 64 - right internal teeth; 65 - boss.

[0019] Figure 3 is an example of the sleeve 2;

[0020] Among them, 2 - sleeve; 21 - external teeth of the sleeve; 24 - end face gear disc.

[0021] Figure 4 is an example of the scale 23;

[0022] Among them, 23 - scale; 26 - scale value A; 28 - scale value B.

[0023] Figure 5 is an example of the developed view of the scale 23.

[0024] Among them, 23 - scale; 25 - pointer A; 26 - scale value A; 27 - pointer B; 28 - scale value B. Specific implementation

[0025] The overall structure is shown in Figure 1 . This is a common layout of process measurement sensors, such as pressure sensors.

[0026] The front part of this structure is the sensing joint 9. The measured signal is introduced into the internal circuit of the housing 1 through the sensing joint 9. The potentiometer 4 is used to set parameters such as the upper limit value, lower limit value, and alarm value. The potentiometer 4 meshes with the end tooth disc on the inner hole of the sleeve 2 via the gear 3. The example of the sleeve 2 is as Figure 3 shown. There are outer teeth 21 on the outer circle of the sleeve 2, which mesh with the left inner teeth 62 corresponding to the protective cover 6. The protective cover 6 is transparent, as Figure 2 shown. By turning the protective cover 6 by hand, the potentiometer 4 can be adjusted, thereby setting the parameter value.

[0027] This embodiment has two sleeves (sleeve 2 and right sleeve 2'), and two parameters can be set. There is a fixing ring 5 between the two sleeves (sleeve 2 and right sleeve 2'). The protective cover 6 has three groups of internally toothed rings distributed in a ring shape (left inner teeth 62, middle inner teeth 63, right inner teeth 64), which mesh with the outer teeth of the sleeve 2, the fixing ring 5, and the right sleeve 2' respectively. The protective cover 6 can be pushed, pulled, and rotated, but will not detach from covering the sleeve 2 and the right sleeve 2', so it can always play a protective role. There are three card slots 10 on the housing 1. There are circumferential small bosses inside the left port of the protective cover, which cooperate with the card slots 10. Pushing and pulling the protective cover 6 can be stopped at these three positions. When the protective cover 6 is pushed to the left position, its left inner teeth 62 remain meshed with the left sleeve 2, and at the same time are disengaged from the fixing ring 5 and the right sleeve 2'. At this time, rotating the protective cover 6 can drive the left sleeve 2 to rotate. On the contrary, when the protective cover 6 is pulled to the right position, its right inner teeth 64 remain meshed with the right sleeve 2' on the right side, and at the same time are disengaged from the fixing ring 5 and the sleeve 2. At this time, rotating the protective cover 6 can drive the right sleeve 2' on the right side to rotate. When the protective cover 6 is in the middle position, its internal teeth (left inner teeth 62, middle inner teeth 63, right inner teeth 64) are simultaneously meshed with the sleeve 2, the fixing ring 5, and the right sleeve 2'. Since the fixing ring 5 is fixed, the protective cover 6 cannot rotate, so that the sleeve 2 and the right sleeve 2' are both locked. In order to prevent slipping and facilitate manual operation, there are convex and concave patterns 61 on the outer circumferential surface of the tail of the protective cover 6. The internal tooth array of the protective cover 6 adopts the measure of spaced dispersion to reduce the occlusion of the tooth shape on the scale 23, as Figure 2 shown.

[0028] In order to prevent the intrusion of liquids, etc., sealing rings 13 are provided at one or both ends of the protective sleeve 6.

[0029] Thus, by pushing and pulling the protective cover 6 to rotate, the setting and locking of two parameters can be conveniently achieved, and the protective effect can be achieved.

[0030] In this embodiment, when the protective cover 6 is pushed to the left, it meshes with the left sleeve 2 and disengages from the right sleeve 2'. On the contrary, if the idle stroke part where the inner teeth (left inner teeth 62 and right inner teeth 64) of the protective cover 6 mesh with the sleeves (sleeve 2 and right sleeve 2') is arranged outside the outer teeth of the sleeves (outer teeth 21 of the sleeve and outer teeth 21' of the right sleeve), it can be achieved that when the protective cover 6 is pushed to the left, it disengages from the left sleeve 2 and meshes with the right sleeve 2' at the same time.

[0031] When the thread of the sensing joint 9 is tightened onto the device, the orientation of the sensor is random, and the scale pointer located on the fixing ring 5 may face the blind area. To solve this problem, two scale pointers, pointer A and pointer B, are arranged on both sides of the circumferential surface of the fixing ring 5 respectively, so that the scale pointers can be seen from two directions. Correspondingly, there are two sets of scale values A and B on the scale 23. Reading the scale value A 26 based on the pointer A 25 and reading the scale value B 28 based on the pointer B 27, the readings of the two are the same. To avoid misreading the corresponding scale values, the font of the scale value A 26 and the pointer A 25 is designed to face one direction, and the group B is designed to face the opposite direction, as Figure 4 shown in the scale 23. Figure 5 is the developed view of the scale 23. In this way, the problem of the observation blind area is solved.

[0032] To make the scale 23 easier to read, lighting measures are taken. The fixing ring 5 is made of a transparent material, and there is a lighting light-emitting diode 11 below it for illumination, which can illuminate the scale 23 through the fixing ring 5. The surface layer of the scale 23 is a light-transmitting layer 22, and the light can illuminate the scale values on the surface of the scale 23 from the inside to the outside of the scale.

[0033] Similarly, to make the action indicator light easy to observe, a transparent action indicator ring 7 is provided, and the light of the action indicator light-emitting diode 12 is led to the entire indicator ring 7, and it can be seen from all directions.

Claims

1. A measurement setting device, having a cylindrical housing (1), having fixed teeth (51) fixed to the housing (1), having at least one sleeve (2) rotatable on the housing (1), having a scale (23) on the sleeve (2), with internal circuitry setting parameters based on the rotational position of the sleeve (2), having a protective cover (6) with internal teeth that can simultaneously engage with the external teeth (21) of the sleeve and the fixed teeth (51) to lock the sleeve (2), characterized in that: The protective cover (6) has at least two positioned card slots (10) on the housing (1). The inner wall of the protective cover (6) has corresponding bosses or grooves that cooperate with the card slots (10). At the position of at least one card slot (10), the protective cover (6) disengages from the fixed teeth (51) while remaining engaged with the sleeve (2), so as to drive the sleeve (2) to rotate while the protective cover (6) does not axially move.

2. The device according to claim 1, characterized in that it further Comprising: The scale (23) on at least one sleeve (2) has two sets of A-group scale values (26) and B-group scale values (28) with staggered phases, and there are two corresponding scale pointers A (25) and pointer B (27).

3. The device according to claim 1, characterized in that it further Comprising: At least part of the sleeve (2) has a light-transmitting layer (22), and the scale (23) is engraved on the surface of the light-transmitting layer (22).

4. The device according to claim 1, characterized in that it further Comprising: There is a light-transmitting fixed ring (5) fixed to the housing (1) on the housing (1), and the fixed ring (5) has fixed teeth (51).

5. The device according to claim 1, characterized in that it further Comprising: There is at least one light-transmitting operation indication ring (7) on the housing (1), and it can be illuminated by the operation indication light-emitting diode (12) below it.

6. The device according to claim 1, characterized in that The protective cover (6) has evenly spaced middle inner teeth (63) and left inner teeth (62), which can be respectively engaged with the fixed teeth (51) and the outer teeth of the sleeve (21).

7. The device according to claim 1, characterized in that The outer surface of the protective cover (6) has local convex and concave patterns (61).

8. The device according to claim 1 or 2 or 3 or 4, characterized in that Inside the housing (1), the illumination light-emitting diode (11) illuminates the scale (23) via the fixed ring (5).

9. The device according to claim 2, characterized in that The two sets of scale values A (26) and scale values B (28) with staggered phases adopt different fonts or colors or orientations.

10. The device according to claim 1, characterized in that At least one end of the protective cover (6) has a sealing ring (13).

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