Air suction hand pump with window scales

Abstract

The utility model relates to the technical field of air suction hand pumps, in particular to an air suction hand pump with window scales, which comprises a pump body, a suction rod movably mounted in the pump body and a visual window, scale marks are arranged on the visual window, a limit rod is movably mounted on the side surface of the pump body, a limit head is fixedly connected to the upper end of the limit rod, and the limit head is fixedly connected to the lower end of the limit rod. The lower end of the limiting rod is fixedly connected with a sliding sleeve, the sliding sleeve is slidably connected to the pump body, one side of the sliding sleeve is rotatably connected with an eccentric wheel, the volume of pumped gas can be observed through the visual window, in the transportation process, the sliding sleeve is limited to move, so that the pumping rod and the pumping handle are not prone to moving outwards, and therefore the occupied space is reduced; when gas needs to be sucked quantitatively, the sliding sleeve is moved upwards, the bottom of the indicating groove points to the corresponding scale line and then is fixed, the piston head is limited to continue to move after sucking the gas upwards to the corresponding volume, and therefore quantitative gas suction is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hand pump technology, specifically a hand pump with a viewing window scale. Background Technology

[0002] A hand pump is a manual tool used to extract gas from a container. Its working principle is mainly based on manual operation, which moves the piston or diaphragm inside the pump body, thereby changing the volume within the pump chamber. Existing hand pumps are not convenient for observing the volume of gas being pumped. In operations requiring a precise volume of gas to be pumped, the lack of a volume measurement structure and the absence of a shut-off mechanism after the specified volume is reached makes it easy to extract too little or too much gas. Furthermore, the pump's plunger is prone to shifting outwards during transport, causing problems and making it inconvenient to carry. Therefore, we propose a hand pump with a graduated viewing window. Utility Model Content

[0003] To solve the above technical problems, this application provides a hand pump with a viewing window and scale, including a pump body, a lever movably installed in the pump body, and a viewing window with scale lines.

[0004] A limiting rod is movably installed on the side of the pump body, and a limiting head is fixedly connected to the upper end of the limiting rod;

[0005] The lower end of the limiting rod is fixedly connected to a sliding sleeve, which is slidably connected to the pump body, and an eccentric wheel is rotatably connected to one side of the sliding sleeve.

[0006] A piston head is fixedly connected to the lower end of the lever, and a pointer is fixedly connected to the upper position of the piston head.

[0007] In some embodiments, a pump head is fixedly connected to the lower end of the pump body, a pump cover is fixedly connected to the upper end of the pump body, and a pull handle is fixedly connected to the upper end of the pull rod through the pump cover.

[0008] In some embodiments, the pull handle has a first sliding hole and a limiting groove, and the upper end of the first sliding hole is connected to the limiting groove. The upper part of the limiting rod is movably installed in the first sliding hole, and the limiting head is movably installed in the limiting groove.

[0009] In some embodiments, a limiting body is fixedly connected to the side of the pump cover, and a sliding hole is provided in the limiting body. The limiting body is slidably connected to the limiting rod through the sliding hole.

[0010] In some embodiments, the sliding sleeve is provided with an indicator groove, the indicator groove is located directly in front of the scale line, the pointer points to the scale line, and the piston head and pointer are located inside the pump body.

[0011] In some embodiments, a connecting body is provided on the sliding sleeve at a position opposite to the eccentric wheel, and the lower end of the limiting rod is fixedly connected to the connecting body.

[0012] In some embodiments, a rotating rod is fixedly connected to the sliding sleeve, an eccentric wheel is rotatably connected to the rotating rod, a rubber sleeve is bonded to the outer side of the eccentric wheel, and a pressing handle is fixedly connected to the eccentric wheel, with the pressing handle passing through the rubber sleeve and pointing outward.

[0013] This utility model has at least the following beneficial effects:

[0014] During transportation, the sliding sleeve is moved downwards and brought close to the pump head. The side of the pump body is then pressed by the operation of the eccentric wheel, thereby braking the sliding sleeve to continue moving. This allows the limiting rod to restrict the pull handle from moving outwards through the limiting head, preventing the pull handle from being removed from the pump body during transportation, which would cause transportation problems.

[0015] When a fixed amount of gas needs to be drawn, move the sliding sleeve upwards until the bottom of the indicator groove points to the corresponding scale line. Then, operate the sliding sleeve brake to stop. At this time, move the pull handle outwards. After the piston head moves to the designated position, the limiting head and the pull handle brake each other, and the pointer points to the corresponding scale, which is on the same horizontal plane as the bottom of the indicator groove, thereby realizing the fixed amount of gas drawn. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembled structure of the viewing window on the pump body of this utility model;

[0018] Figure 3 This is a schematic diagram showing the disassembled structure of the pump body and the draw rod of this utility model;

[0019] Figure 4 This is a cross-sectional view of the pull-out handle of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the pull rod of this utility model;

[0021] Figure 6 This is a schematic diagram showing the disassembled structure of the eccentric wheel on the sliding sleeve of this utility model.

[0022] In the diagram: 1. Pump body; 2. Pump head; 3. Pump cover; 301. Restrictor; 4. Viewing window; 401. Scale line; 5. Pull rod; 6. Piston head; 601. Pointer; 7. Pull handle; 701. No. 1 sliding hole; 702. Restriction groove; 8. Restriction rod; 801. Restriction head; 9. Sliding sleeve; 901. Indicator groove; 902. Connector; 903. Rotating rod; 904. Eccentric wheel; 905. Press handle; 906. Rubber sleeve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] Please see Figure 1-4 This utility model provides a technical solution: a hand pump with a viewing window and scale, including a pump body 1, a pull rod 5 movably installed inside the pump body 1, and a viewing window 4 with scale lines 401. A pump head 2 is fixedly connected to the lower end of the pump body 1, a pump cover 3 is fixedly connected to the upper end of the pump body 1, a pull handle 7 is fixedly connected to the upper end of the pull rod 5 through the pump cover 3, a piston head 6 is fixedly connected to the lower end of the pull rod 5, and a pointer 601 is fixedly connected above the piston head 6. The piston head 6 and the pointer 601 are located inside the pump body 1.

[0026] Pull the handle 7 to move the lever 5, which in turn moves the piston head 6 in the pump body 1. The pump body 1 contacts the target through the pump head 2, thereby drawing gas from inside the target. The pump body 1 is provided with a viewing window 4 for observing the volume of gas drawn from inside the pump body 1. The viewing window 4 is provided with a scale line 401 to mark the scale value pointed to by the pointer 601 on the piston head 6, so as to clearly display the volume of gas drawn inside.

[0027] Furthermore, a limiting rod 8 is movably installed on the side of the pump body 1. A sliding hole 701 and a limiting groove 702 are provided on the pull handle 7, and the upper end of the sliding hole 701 is connected to the limiting groove 702. The upper part of the limiting rod 8 is movably installed in the sliding hole 701. A limiting body 301 is fixedly connected to the side of the pump cover 3. A sliding hole is provided in the limiting body 301. The limiting body 301 is slidably connected to the limiting rod 8 through the sliding hole. The limiting rod 8 is located on the side of the pump body 1.

[0028] The limiting rod 8 is housed through a sliding hole in the limiting body 301. The upper part of the limiting rod 8 is slidably connected to the first sliding hole 701 of the pull handle 7, so that the limiting rod 8 can restrict the pull rod 5, piston head 6 and pointer 601 and other structures to move outward without deflection. The pointer 601 can always point to the scale line 401 in the front position, making it easier to read the value when observing the gas volume.

[0029] Example 2:

[0030] Please see Figure 1 , Figure 3 , Figure 5 and Figure 6 Based on Embodiment 1, this utility model provides another technical solution: a limiting head 801 is fixedly connected to the upper end of the limiting rod 8, and a sliding sleeve 9 is fixedly connected to the lower end of the limiting rod 8. The sliding sleeve 9 is slidably connected to the pump body 1, and an eccentric wheel 904 is rotatably connected to one side of the sliding sleeve 9. An indicator groove 901 is provided on the sliding sleeve 9. The indicator groove 901 is located directly in front of the scale line 401, and the pointer 601 points to the scale line 401. The limiting head 801 is movably installed in the limiting groove 702. The indicator groove 901 allows the user to easily observe the scale line 401 through the bottom position of the indicator groove 901. When the limiting head 801 is installed in the limiting groove 702, the pull handle 7 cannot continue to move outward, thereby creating conditions to stop the pull handle 7 and the lever 5 from continuing to move.

[0031] Furthermore, a connecting body 902 is provided on the sliding sleeve 9 at the opposite position of the eccentric wheel 904. The lower end of the limiting rod 8 is fixedly connected to the connecting body 902. A rotating rod 903 is fixedly connected to the sliding sleeve 9. The eccentric wheel 904 is rotatably connected to the rotating rod 903. A rubber sleeve 906 is bonded and fixed to the outer side of the eccentric wheel 904. A pressing handle 905 is fixedly connected to the eccentric wheel 904, and the pressing handle 905 passes through the rubber sleeve 906 and points outward.

[0032] After the sliding sleeve 9 is fixedly connected to the pull rod 5, when the eccentric wheel 904 rotates to the side, it is pressed and fixed by the rubber sleeve 906 against the side wall of the pump body 1, so that the pull rod 5 cannot move outward. The pull rod 5 is inserted into the limiting groove 702 through the limiting head 801, so that the pull handle 7 and the pull rod 5 are fixed and will not move outward. This can prevent the pull rod 5 from moving outward and causing problems during transportation, making it convenient to carry when going out.

[0033] When a quantitative gas extraction is required, the eccentric wheel 904 is rotated in the opposite direction by pressing the handle 905, so that the eccentric wheel 904 is in fixed contact with the side of the pump body 1. At this time, the sliding sleeve 9 is moved upward to the designated position, and the pull rod 5 and the limiting head 801 move synchronously. After the bottom of the indicator groove 901 points to the specified scale line 401, the eccentric wheel 904 is rotated in the opposite direction, and the eccentric wheel 904 is fixed to the side wall of the pump body 1 again. Then, the pull handle 7 is moved so that the pull handle 7 slides on the limiting rod 8 through the first sliding hole 701. The piston head 6, the pull rod 5 and the pointer 601 move synchronously. When the limiting head 801 is locked into the limiting groove 702 again, the pointer 601 points to the bottom position of the indicator groove 901 and synchronously points to the specified scale line 401, thereby realizing the quantitative extraction of gas volume.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hand pump with a viewing window scale, comprising a pump body (1), wherein a pull rod (5) is movably installed within the pump body (1), characterized in that: It also includes a viewing window (4), on which scale lines (401) are provided. A limiting rod (8) is movably installed on the side of the pump body (1), and a limiting head (801) is fixedly connected to the upper end of the limiting rod (8). The lower end of the limiting rod (8) is fixedly connected to a sliding sleeve (9), which is slidably connected to the pump body (1), and an eccentric wheel (904) is rotatably connected to one side of the sliding sleeve (9). The lower end of the pull rod (5) is fixedly connected to a piston head (6), and a pointer (601) is fixedly connected to the upper position of the piston head (6).

2. The hand pump with a viewing window scale according to claim 1, characterized in that: The pump body (1) is fixedly connected to the lower end of the pump head (2), and the pump cover (3) is fixedly connected to the upper end of the pump body (1). The upper end of the pull rod (5) passes through the pump cover (3) and is fixedly connected to the pull handle (7).

3. A hand pump with a viewing window scale according to claim 2, characterized in that: The pull handle (7) has a first sliding hole (701) and a limiting groove (702), and the upper end of the first sliding hole (701) is connected to the limiting groove (702). The upper part of the limiting rod (8) is movably installed in the first sliding hole (701), and the limiting head (801) is movably installed in the limiting groove (702).

4. A hand pump with a viewing window scale according to claim 3, characterized in that: A limiting body (301) is fixedly connected to the side of the pump cover (3), and a sliding hole is provided in the limiting body (301). The limiting body (301) is slidably connected to the limiting rod (8) through the sliding hole.

5. A hand pump with a viewing window scale according to claim 4, characterized in that: The sliding sleeve (9) is provided with an indicator groove (901), the indicator groove (901) is located in front of the scale line (401), the pointer (601) points to the scale line (401), and the piston head (6) and the pointer (601) are located inside the pump body (1).

6. A hand pump with a viewing window scale according to claim 5, characterized in that: A connecting body (902) is provided on the sliding sleeve (9) at the opposite position to the eccentric wheel (904), and the lower end of the limiting rod (8) is fixedly connected to the connecting body (902).

7. A hand pump with a viewing window scale according to claim 6, characterized in that: A rotating rod (903) is fixedly connected to the sliding sleeve (9), and the eccentric wheel (904) is rotatably connected to the rotating rod (903). A rubber sleeve (906) is bonded and fixed to the outer side of the eccentric wheel (904), and a pressing handle (905) is fixedly connected to the eccentric wheel (904), and the pressing handle (905) passes through the rubber sleeve (906) and points outward.

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