Upper cover connecting structure of ultrasonic water meter

Abstract

The utility model relates to an ultrasonic water meter upper cover connecting structure, and belongs to the technical field of ultrasonic flow measurement. According to the technical scheme, the upper shell comprises an upper cover, a connecting shaft and an upper shell body; the upper cover and the upper shell body are respectively matched with the connecting shaft, the upper cover, the upper shell body and the connecting shaft are mutually matched to form a whole, and due to the effect of the connecting shaft, the upper cover can rotate in the horizontal dimension and the vertical dimension. The upper cover connecting structure of the ultrasonic water meter has the advantages that the upper cover can rotate in the vertical direction of the fixing shaft and rotate in the horizontal direction of the axis of the connecting shaft, and operations such as reading and communication can be carried out in a small space range; the slide way is adopted for locking, installation is convenient, and the locking structure is not prone to damage; the mode that the buckle boss is matched with the annular clamping groove is adopted, due to the lever principle, locking is firmer, and the probability that the upper cover falls off is reduced.

Description

Technical Field

[0001] The utility model relates to an ultrasonic water meter upper cover connection structure, in particular to an ultrasonic water meter upper cover connection structure for realizing small space operation, and belongs to the technical field of ultrasonic flow measurement. Background Art

[0002] The top cover is an important component of ultrasonic water meters used to protect the display screen. Most of the top covers of ultrasonic water meters in existing technologies are fixedly installed and opened in a single direction around a fixed axis for readings and other operations. The problems are: the angle cannot be adjusted according to actual needs, and the requirements of opening the top cover in a small space to read or communicate with the water meter cannot be met. In addition, the locking device of most water meter top covers adopts an interference fit, and the connection method is relatively simple, and the probability of the top cover falling off is relatively high. In the face of this problem, the common practices of existing technologies are: 1. The top cover of the water meter is transparent or designed with a reading window for easy reading. 2. The locking device increases the interference to reduce the probability of the top cover falling off. The above method has problems: some water meters cannot communicate, the installation difficulty is increased, and the risk of damage to the locking device is increased. Utility Model Content

[0003] The utility model aims to provide an ultrasonic water meter upper cover connection structure, which adds a rotatable connection device, changes the locking device structure, is easy to assemble, has a reliable structure, and solves the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] The cam is secured to the upper and lower surfaces of the housing and the cam is secured to the upper and lower surfaces of the housing and the cam is secured to the upper and lower surfaces of the housing and the cam. The shaft slides from the slideway into the locking grooves on both sides of the protrusion, and the fixed shaft cooperates with the locking groove, so that the upper cover can be opened and closed vertically. The lower part of the positioning boss is provided with an annular snap-on boss, and the outer diameter of the positioning boss matches the inner diameter of the reserved hole in the shell. The outer diameter of the snap-on boss matches the inner diameter of the annular snap-on groove in the reserved hole in the shell, and the outer diameter of the snap-on boss is larger than the inner diameter of the reserved hole in the shell. A plurality of longitudinally arranged unloading grooves are provided on the circumference of the positioning boss and the snap-on boss, and the unloading grooves open at the bottom of the positioning boss. When external force presses on the unloading grooves, the snap-on boss deforms and its outer diameter becomes smaller. The positioning boss and the snap-on boss are inserted into the reserved hole in the shell. After the snap-on boss enters the annular snap-on groove in the reserved hole in the shell, the unloading groove recovers its deformation, and the positioning boss rotates horizontally in the reserved hole in the shell without falling out. The upper cover rotates horizontally with the positioning boss. Due to the action of the connecting shaft, the upper cover can rotate in both horizontal and vertical dimensions.

[0006] Furthermore, the lower edge of the slide enters the reserved hole of the shell along with the positioning boss, and the upper edge of the slide does not enter the reserved hole of the shell; the distance between the upper shell and the upper edge of the slide is smaller than the diameter of the fixed shaft, and the fixed shaft cannot slide out of the slide from the locking groove, thereby achieving locking.

[0007] Furthermore, the locking groove is arranged obliquely upward to the slide. After the fixed shaft slides into the locking groove from the slide, the sliding direction of the fixed shaft changes due to the upward tilt of the locking groove. The fixed shaft slides to the end position of the locking groove, which is higher than the lower edge of the slide and does not affect the rotation.

[0008] Furthermore, a plurality of vertically arranged ridges are provided on the circumference of the positioning boss to increase the interference fit between the positioning boss and the reserved hole of the shell.

[0009] Furthermore, the convex ridges are located on the circumference of the positioning boss above the snap boss.

[0010] Furthermore, there are four force-releasing grooves, which are evenly distributed on the circumference of the positioning boss, dividing the bottom of the positioning boss into four arc parts.

[0011] Furthermore, the number of the convex ridges is four, which are evenly distributed on the circumference of the positioning boss; the convex ridges and the force unloading grooves are arranged at intervals on the circumference of the positioning boss.

[0012] Furthermore, the positioning boss, protrusion, locking groove, slide, snap boss, force unloading groove and ridge are integrally injection molded; the upper shell, shell reserved hole and annular slot are integrally injection molded; the upper cover, notch and fixed shaft are integrally injection molded.

[0013] The beneficial effects of the utility model are as follows: the upper cover connection structure of the ultrasonic water meter realizes the upper cover to rotate vertically along the fixed axis and horizontally along the axis of the connecting axis, and operations such as reading and communication can be performed in a small space; the slide locking is adopted, which is convenient to install and not easy to damage the locking structure; the buckle boss and the annular groove are matched, and due to the lever principle, the locking is more secure, reducing the probability of the upper cover falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the upper cover structure of an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the connecting shaft structure of an embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the upper shell structure of an embodiment of the utility model;

[0018] In the figure: upper cover 1, connecting shaft 2, upper shell 3, fixed shaft 4, positioning boss 5, locking groove 6, slide 7, unloading groove 8, snap boss 9, shell reserved hole 10, annular groove 11, slide upper edge 12, slide lower edge 13, notch 14, protrusion 15, convex ridge 16. DETAILED DESCRIPTION

[0019] The present invention will be further described below through embodiments with reference to the accompanying drawings.

[0020] Refer to the attached Figure 1-4, an ultrasonic water meter upper cover connection structure, comprising an upper cover 1, a connecting shaft 2 and an upper shell 3; the upper cover 1 and the upper shell 3 are respectively matched with the connecting shaft 2, and the three cooperate with each other to form a whole; the surface of the upper shell 3 is provided with a shell reserved hole 10, and the shell reserved hole 10 is provided with an annular groove 11; the upper cover is provided with a notch 14, and the two inner side walls of the notch 14 are symmetrically provided with a fixed shaft 4; the lower part of the connecting shaft 2 is a circular positioning boss 5, and the upper part of the positioning boss 5 The protrusion 15 has a symmetrical structure on both sides of the protrusion 15, and a locking groove 6 is provided. The opening of the locking groove 6 is a slide 7. The slide 7 is connected to the locking groove 6 as a whole. The slide 7 includes a slide upper edge 12 and a slide lower edge 13 arranged parallel to each other. The slide upper edge 12 and the slide lower edge 13 are parallel to the upper surface of the upper shell 3. The axis of the locking groove 6 is inclined to the slide upper edge 12, the slide lower edge 13 and the upper surface of the upper shell 3; the inner sides of the notch 14 of the upper cover 1 are The fixed shaft 4 on the wall slides into the locking groove 6 on both sides of the protrusion 15 by the slide 7 respectively. The fixed shaft 4 cooperates with the locking groove 6, and the upper cover 1 can be opened and closed in the vertical direction; the lower part of the positioning boss 5 is provided with an annular snap boss 9, the outer diameter of the positioning boss 5 matches the inner diameter of the shell reserved hole 10, the outer diameter of the snap boss 9 matches the inner diameter of the annular snap groove 11 in the shell reserved hole 10, and the outer diameter of the snap boss 9 is larger than the inner diameter of the shell reserved hole 10; the positioning boss 5 and Multiple longitudinally arranged unloading grooves 8 are provided on the circumference of the snap-on boss 9, which opens at the bottom of the positioning boss 5. External force compresses the unloading grooves 8, causing the snap-on boss 9 to deform and reduce its outer diameter. The positioning boss 5 and snap-on boss 9 are then inserted into the housing's reserved hole 10. Once the snap-on boss 9 enters the annular retaining groove 11 within the housing's reserved hole 10, the unloading grooves 8 regain their shape, allowing the positioning boss 5 to rotate horizontally within the housing's reserved hole 10 without falling out. The upper cover 1 rotates horizontally along with the positioning boss 5. Due to the connecting shaft, the upper cover can rotate in both horizontal and vertical dimensions.

[0021] The lower edge 13 of the slide enters the reserved hole 10 of the shell along the positioning boss 5, and the upper edge 12 of the slide does not enter the reserved hole 10 of the shell; the distance between the upper shell 3 and the upper edge 13 of the slide is less than the diameter of the fixed shaft 4, and the fixed shaft cannot slide out of the slide 7 from the locking groove 6, thereby achieving locking.

[0022] The locking groove 6 is arranged obliquely upward from the slide 7. After the fixed shaft 4 slides into the locking groove 6 from the slide 7, the sliding direction of the fixed shaft 4 changes due to the upward tilt of the locking groove 6. The fixed shaft 4 slides to the end position of the locking groove 6, which is higher than the lower edge 13 of the slide and does not affect the rotation.

[0023] A plurality of vertically arranged ridges 16 are provided on the circumference of the positioning boss 5 to increase the interference fit between the positioning boss 5 and the reserved hole 10 of the housing.

[0024] The convex ridges 16 are located on the circumference of the positioning boss 5 above the snap boss 9 .

[0025] There are four unloading grooves 8 , which are evenly distributed on the circumference of the positioning boss 5 , dividing the bottom of the positioning boss 5 into four arc parts.

[0026] There are four convex ridges 16 , which are evenly distributed on the circumference of the positioning boss 5 ; the convex ridges 16 and the unloading grooves 8 are spaced apart on the circumference of the positioning boss 5 .

[0027] The positioning boss 5, protrusion 15, locking groove 6, slide 7, snap boss 9, force unloading groove 8 and ridge 16 are integrally injection molded; the upper shell 3, shell reserved hole 10 and annular slot 11 are integrally injection molded; the upper cover 1, notch 14 and fixed shaft 4 are integrally injection molded.

[0028] The assembly process of the utility model is as follows: ① The upper cover 1 and the connecting shaft 2 are assembled together to form component one; the fixed shaft 4 on the two inner side walls of the notch 14 of the upper cover 1 is slid from the slideway 7 to the locking grooves 6 on both sides of the protrusion 15 of the connecting shaft 2, and the fixed shaft 4 cooperates with the locking groove 6, and the upper cover 1 can be opened and closed up and down in the vertical direction; ② Install component one on the upper shell 3; use external force to press the positioning boss 5 and the force unloading groove 8 at the lower part of the connecting shaft 2, the snap boss 9 is deformed, and the outer diameter becomes smaller, and the positioning boss 5 and the snap boss 9 are inserted into the reserved hole 10 of the shell. After the positioning boss 5 enters the reserved hole 10 of the shell, the snap boss 9 cooperates with the annular groove 11, and the force unloading groove 8 restores its deformation. The positioning boss 5 can rotate horizontally in the reserved hole 10 of the shell and will not fall out, and the upper cover 1 rotates horizontally with the positioning boss 5.

[0029] Refer to the attached Figure 2 The upper cover is the main structure for protecting the LCD screen. Its size is smaller than that of the upper shell. A fixed shaft 4 is injection-molded at its end, which enters the locking groove 6 through the connecting shaft slide 7 and fits with the locking groove 6 to form a connection structure that rotates in a fixed direction. When there is enough space, the upper cover is opened along the fixed axis to perform operations such as reading or communication.

[0030] Refer to the attached Figure 3The connecting shaft 2 is the main component connecting the upper cover and the upper shell body. A locking groove 6 is injection-molded on the upper end, a positioning boss 5 and a force unloading groove 8 are injection-molded around it, and a snap boss 9 is injection-molded on the lower end. The locking groove consists of two parts, namely the locking groove 6 and the slide 7. The slide 7 is divided into an upper edge 12 of the slide and a lower edge 13 of the slide. The upper edge 12 and the lower edge 13 of the slide are respectively parallel to the upper surface of the upper shell body. The slide 7 is connected to the locking groove 6 as a whole. There is a certain angle between the two, and the fixed shaft 4 can slide into the locking groove by the slide; the circular contour of the positioning boss 5 is concentric with the reserved hole 10 of the shell, and the connecting shaft 2 is pressed into the reserved hole 10 of the shell along the positioning boss. The outer diameter of the snap boss 9 is larger than the inner diameter of the reserved hole 10 of the shell, and the unloading groove 8 is subjected to force and elastically deformed. After the snap boss enters the slot, the unloading groove recovers its deformation, and the lower edge 13 of the slide enters the reserved hole 10 of the shell. The remaining size of the upper shell body 3 and the upper edge 12 of the slide is smaller than the diameter of the fixed shaft 4. The fixed shaft 4 cannot slide out of the slide 7 by the locking groove 6, and locking is achieved.

[0031] The locking groove 6 is connected to the slide 7 and forms a certain angle with the slide 7. The fixed shaft 4 slides into the slide 7. Due to the angle, the sliding direction of the fixed shaft 4 changes at the connection between the slide and the locking groove. The fixed shaft 4 slides to the end position of the locking groove 6, which is higher than the lower edge 13 of the slide.

[0032] The upper shell body 3 is provided with a shell reserved hole 10 and an annular groove 11 for installing the connecting shaft. The positioning boss 5 of the connecting shaft enters the shell reserved hole 10, the snap boss 9 cooperates with the annular groove 11, the unloading groove restores the deformation, and the connecting shaft 2 and the upper shell body 3 form a rotatable structure.

Claims

1. An ultrasonic water meter cover connection structure, characterized by: The invention comprises an upper cover (1), a connecting shaft (2) and an upper shell (3); the upper cover (1) and the upper shell (3) are respectively matched with the connecting shaft (2), and the three are matched with each other to form a whole; a shell reserved hole (10) is provided on the surface of the upper shell (3), and an annular groove (11) is provided in the shell reserved hole (10); the upper cover is provided with a notch (14), and fixed shafts (4) are symmetrically provided on the two inner side walls of the notch (14); the lower part of the connecting shaft (2) is a circular positioning boss (5), the upper part of the positioning boss (5) is a protrusion (15), the structures on both sides of the protrusion (15) are symmetrical and the same, both are provided with a locking groove (6), the opening of the locking groove (6) is a slideway (7), the slideway (7) and the locking groove (6) are connected as a whole, the slideway (7) includes a slideway upper edge (12) and a slideway lower edge (13) arranged parallel to each other, the slideway upper edge (12) and the slideway lower edge (13) are parallel to the upper surface of the upper shell (3), the axis of the locking groove (6) is parallel to the slideway upper edge (12). The upper shell (3) is arranged obliquely along (12), the lower edge of the slide (13) and the upper surface of the upper shell; the fixed shaft (4) on the two inner side walls of the notch (14) of the upper cover (1) slides from the slide (7) to the locking grooves (6) on both sides of the protrusion (15), and the fixed shaft (4) cooperates with the locking grooves (6); the lower part of the positioning boss (5) is provided with an annular snap boss (9), the outer diameter of the positioning boss (5) matches the inner diameter of the shell reserved hole (10), and the outer diameter of the snap boss (9) matches the inner diameter of the shell reserved hole (10). The inner diameter of the annular groove (11) in the shell reserved hole (10) matches, and the outer diameter of the snap boss (9) is larger than the inner diameter of the shell reserved hole (10); a plurality of longitudinally arranged unloading grooves (8) are provided on the circumference of the positioning boss (5) and the snap boss (9), and the unloading grooves (8) are opened at the bottom of the positioning boss (5); the positioning boss (5) and the snap boss (9) are inserted into the shell reserved hole (10), and the positioning boss (5) rotates horizontally in the shell reserved hole (10) and will not fall out.

2. The ultrasonic water meter upper cover connection structure according to claim 1, characterized in that: A plurality of vertically arranged ridges (16) are provided on the circumference of the positioning boss (5).

3. The ultrasonic water meter upper cover connection structure according to claim 2, characterized in that: The convex ridges (16) are located on the circumference of the positioning boss (5) above the snap boss (9).

4. The ultrasonic water meter upper cover connection structure according to claim 2, characterized in that: There are four force unloading grooves (8) evenly distributed on the circumference of the positioning boss (5), dividing the bottom of the positioning boss (5) into four circular arcs.

5. The ultrasonic water meter upper cover connection structure according to claim 2, characterized in that: The number of the convex ridges (16) is four and they are evenly distributed on the circumference of the positioning boss (5); the convex ridges (16) and the unloading grooves (8) are spaced apart on the circumference of the positioning boss (5).

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