Automatic disinfecting and drying equipment for medical orthopedic instruments

Abstract

The invention provides automatic disinfecting and drying equipment for medical orthopedic instruments. The automatic disinfecting and drying equipment for the medical orthopedic instruments comprises a protection box, a plurality of supporting ground feet distributed in a rectangular shape are fixedly installed at the bottom of the protection box, a conveying and hanging mechanism is arranged on a protection plate, and the conveying and hanging mechanism penetrates through the protection box; a first disinfection mechanism, a drying mechanism and a second disinfection mechanism are arranged in the protection plate, and the drying mechanism is located between the first disinfection mechanism and the second disinfection mechanism. The automatic disinfecting and drying equipment for the medical orthopedic instruments has the advantages that use is convenient, the instruments can be continuously treated, and the cleanliness of the treated instruments can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an automatic disinfection and drying device for medical orthopedic devices. Background Art

[0002] The cleaning process of medical devices refers to the process of removing contaminants and some microorganisms attached to the surface of medical devices, including blood, tissue, endotoxin, and protein, etc. The cleaning methods include mechanical cleaning and manual cleaning. Mechanical cleaning is applicable to the cleaning of most conventional devices, and manual cleaning is suitable for the cleaning of precision and complex devices and the preliminary treatment of devices with serious organic contamination.

[0003] There is a disclosed automatic disinfection and drying device for medical orthopedic devices in the prior art, including a frame assembly, a conversion and fixation assembly, and a disinfection assembly. The frame assembly is fixedly installed on the ground, used to place the medical orthopedic devices to be disinfected into the conversion and fixation assembly, and serve as an installation platform for other components. The role of the conversion and fixation assembly is to clamp the components to be disinfected, rotate them into the disinfection assembly, achieve all-round disinfection and then rotate them onto the collection device of the frame assembly for collection. Although it has the characteristics of high automation and comprehensive disinfection, when disinfecting and drying the devices, it needs to be carried out batch by batch and cannot be continuous, resulting in a reduction in the efficiency of disinfecting and drying the devices. At the same time, there is also a disclosed automatic disinfection and drying device for medical orthopedic devices in the prior art, including an automatic disinfection and drying chamber and an automatic spreader. There are hanging rods in the automatic disinfection and drying chamber; the automatic spreader includes a seat body, there is a slot on the seat body, there are protrusions on the inner wall of the slot to place the coil, and there is a winding device in the slot. The winding device is used to wind the coil around the bottom of the pliers or scissor tools so that the bottom shrinks and both sides of the coil are wound into a buckle; the winding buckle at the bottom of the pliers or scissor tools is used to hang on the hanging rod. Although it can automatically open the orthopedic pliers or scissor devices, and can cooperate with specific hanging rods for independent and non-interfering hanging, and at the same time avoid the collision of orthopedic pliers or scissor devices during cleaning; when disinfecting and drying the devices, it also needs to be carried out batch by batch and cannot be continuous, resulting in a reduction in the efficiency of disinfecting and drying the devices.

[0004] Therefore, it is necessary to provide a new automatic disinfection and drying device for medical orthopedic devices to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide an automatic disinfection and drying device for medical orthopedic devices that is convenient to use, can continuously process the devices, and can ensure the cleanliness of the processed devices.

[0006] To solve the above technical problems, the automatic disinfection and drying equipment for medical orthopedic instruments provided by the present invention includes: a protective box, a plurality of support feet distributed in a rectangle are fixedly installed at the bottom of the protective box, a conveying and hanging mechanism is provided on the protective plate, the conveying and hanging mechanism penetrates through the protective box, a first disinfection mechanism, a drying mechanism and a second disinfection mechanism are provided inside the protective plate, and the drying mechanism is located between the first disinfection mechanism and the second disinfection mechanism; The conveying and hanging mechanism is used to hang the instruments and at the same time sequentially pass the hung instruments through the first disinfection mechanism, the drying mechanism and the second disinfection mechanism; The first disinfection mechanism disinfects the instruments by soaking them in disinfectant solution; The drying mechanism is used to dry the instruments; The second disinfection mechanism disinfects the instruments by ultraviolet irradiation.

[0007] Preferably, the conveying and hanging mechanism includes two conveyor belts, two first conveyor frames and two second conveyor frames are provided on the conveyor belts, the two first conveyor frames and the two second conveyor frames are respectively fixedly installed on both sides of the protective box, a plurality of connecting plates are fixedly installed between the two conveyor belts, a plurality of fixing bolts distributed linearly are detachably installed on the connecting plates, and the bottom of the fixing bolts extends below the connecting button and a hook is fixedly installed.

[0008] Preferably, a motor is fixedly installed on one side of the protective box, a driving shaft is fixedly installed on the output shaft of the motor, and the driving shaft is rotationally connected to the protective box.

[0009] Preferably, the first conveyor frame includes a first bracket and a first pulley rotatably installed on the first bracket, the second conveyor frame includes a second bracket and a second pulley rotatably installed on the second bracket, and the driving shaft penetrates through the two first pulleys on the same side of the protective box.

[0010] Preferably, the first disinfection mechanism includes a disinfection box for containing disinfectant solution, a first fixing frame is fixedly installed at the bottom of the disinfection box, and the bottom of the first fixing frame is fixedly installed on the inner wall of the bottom of the protective box.

[0011] Preferably, a plurality of ultrasonic generators are provided on the inner wall of the bottom of the disinfection box.

[0012] Preferably, four third conveyor frames are fixedly installed on the side wall of the disinfection box, four fourth conveyor frames are fixedly installed on the top of the disinfection box, and the conveyor belt is sleeved outside the corresponding two third conveyor frames and two fourth conveyor frames.

[0013] Preferably, the drying mechanism includes a drying box. A second fixing frame is fixedly installed at the bottom of the drying box, and the bottom of the second fixing frame is fixedly installed on the bottom inner wall of the protective box. The conveying and hanging mechanism penetrates through the drying box. A partition is fixedly installed in the drying box. A plurality of through holes are formed in the top of the partition, and heating rods fixedly installed on the inner wall of the drying box are arranged below the partition.

[0014] Preferably, a smoke collection hood is arranged at the top of the drying box, and one end of an exhaust pipe is connected to the top of the smoke collection hood.

[0015] Preferably, the second disinfection mechanism includes an ultraviolet lamp installation box. A third fixing frame is fixedly installed at the bottom of the ultraviolet lamp installation box, and the bottom of the third fixing frame is fixedly installed on the bottom inner wall of the protective box. The conveying and hanging mechanism penetrates through the ultraviolet lamp installation box. A plurality of first ultraviolet lamps are fixedly installed on the bottom inner and top inner walls of the ultraviolet lamp installation box, and a plurality of second ultraviolet lamps are fixedly installed on the side wall of the ultraviolet lamp installation box. The second ultraviolet lamps are arranged obliquely.

[0016] Compared with the related art, the automatic disinfection and drying equipment for medical orthopedic instruments provided by the present invention has the following beneficial effects: The present invention provides an automatic disinfection and drying device for medical orthopedic instruments. Through the setting of a protective box, when cleaning the instruments, the instruments can always be in a relatively enclosed environment, thereby effectively avoiding secondary contamination of the instruments during disinfection and drying. Through a transmission and suspension mechanism composed of a conveyor belt, a first transmission rack, a second transmission rack, a connecting plate, fixing bolts, hooks, a motor, and a driving shaft, the instruments can be suspended and moved, and the instruments to be processed can be continuously passed through a first disinfection mechanism, a drying mechanism, and a second disinfection mechanism in sequence, thereby enabling continuous disinfection and drying of different instruments, and effectively improving the efficiency of instrument processing. Through a first disinfection mechanism composed of a disinfection box, a first fixing rack, an ultrasonic generator, a third transmission rack, and a fourth transmission rack, when the instruments suspended on the hooks enter above the disinfection box, the instruments can be automatically moved into the disinfectant solution, thereby ensuring the disinfection quality and efficiency of the disinfectant solution for the instruments. At the same time, with the cooperation of the ultrasonic generator, the instruments can be better disinfected, and the attachments on the instruments can be stripped from the instruments. Through a drying mechanism composed of a drying box, a second fixing rack, a flue gas collection hood, an exhaust pipe, a partition plate, through holes, and heating rods, the instruments can be dried, and at the same time, the exhaust gas generated during drying can be treated. Through a second disinfection mechanism composed of an ultraviolet lamp installation box, a third fixing rack, a first ultraviolet lamp, and a second ultraviolet lamp, the dried instruments can be further disinfected, thereby improving the disinfection quality of the entire device for orthopedic instruments and ensuring the cleanliness of the cleaned orthopedic instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 is a schematic structural diagram of a preferred embodiment of the automatic disinfection and drying device for medical orthopedic instruments provided by the present invention; Figure 2 FIG. Figure 1 7 is a schematic structural diagram of another perspective shown in FIG. 6; Figure 3 FIG. Figure 2 8 is a schematic cross-sectional structural diagram shown in FIG. 6; Figure 4 FIG. Figure 1 9 is a schematic structural diagram of the structure after removing the protective box and the support feet shown in FIG. 6; Figure 5 FIG. Figure 4 10 is a schematic structural diagram of the transmission and suspension mechanism shown in FIG. 6; Figure 6 FIG. Figure 4 11 is a schematic structural diagram of the first disinfection mechanism shown in FIG. 6; Figure 7 FIG. Figure 6 12 is a schematic cross-sectional structural diagram shown in FIG. 11; Figure 8 FIG. Figure 4Schematic structural diagram of the drying mechanism 5 shown; Figure 9 is Figure 8 Schematic structural diagram of another perspective shown; Figure 10 is Figure 8 Schematic cross-sectional structural diagram shown; Figure 11 is Figure 4 Schematic structural diagram of the second disinfection mechanism shown; Figure 12 is Figure 11 Schematic cross-sectional structural diagram of another perspective shown.

[0018] Reference numerals in the figure: 1, protective box; 2, support feet; 3, conveying and hanging mechanism, 301, conveyor belt, 302, first conveying frame, 303, second conveying frame, 304, connecting plate, 305, fixing bolts, 306, hooks, 307, motor, 308, driving shaft; 4, first disinfection mechanism, 401, disinfection box, 402, first fixing frame, 403, ultrasonic generator, 404, third conveying frame, 405, fourth conveying frame; 5, drying mechanism, 501, drying box, 502, second fixing frame, 503, flue gas collection hood, 504, exhaust pipe, 505, partition board, 506, through hole, 507, heating rod; 6, second disinfection mechanism, 601, ultraviolet lamp installation box, 602, third fixing frame, 603, first ultraviolet lamp, 604, second ultraviolet lamp. Specific embodiments

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Please refer to Figures 1 - 12 , wherein Figure 1 is a schematic structural diagram of a preferred embodiment of the automatic disinfection and drying device for medical orthopedic instruments provided by the present invention; Figure 2 is Figure 1 Schematic structural diagram of another perspective shown; Figure 3 is Figure 2 Schematic cross-sectional structural diagram shown; Figure 4 is Figure 1 Schematic structural diagram after removing the protective box and support feet shown; Figure 5 is Figure 4 Schematic structural diagram of the conveying and hanging mechanism shown; Figure 6 is Figure 4 Schematic structural diagram of the first disinfection mechanism shown; Figure 7 is Figure 6 Schematic cross-sectional structural diagram shown; Figure 8 is Figure 4 Schematic structural diagram of the drying mechanism 5 shown; Figure 9is Figure 8 a schematic structural diagram from another perspective as shown; Figure 10 is Figure 8 a schematic cross-sectional structure diagram as shown; Figure 11 is Figure 4 a schematic structural diagram of the second disinfection mechanism as shown; Figure 12 is Figure 11 a schematic cross-sectional structure diagram from another perspective as shown. The automatic disinfection and drying equipment for medical orthopedic instruments includes: a protective box 1, a plurality of support feet 2 distributed in a rectangle are fixedly installed at the bottom of the protective box 1, a conveying and hanging mechanism 3 is arranged on the protective plate 1, the conveying and hanging mechanism 3 penetrates through the protective box 1, a first disinfection mechanism 4, a drying mechanism 5 and a second disinfection mechanism 6 are arranged in the protective plate 1, and the drying mechanism 5 is located between the first disinfection mechanism 4 and the second disinfection mechanism 6; The conveying and hanging mechanism 3 is used to hang the instruments and simultaneously pass the hung instruments through the first disinfection mechanism 4, the drying mechanism 5 and the second disinfection mechanism 6 in sequence; The first disinfection mechanism 4 disinfects the instruments by soaking them in disinfectant solution; The drying mechanism 5 is used to dry the instruments; The second disinfection mechanism 6 disinfects the instruments by ultraviolet irradiation.

[0021] The conveying and hanging mechanism 3 includes two conveyor belts 301, two first conveyor frames 302 and two second conveyor frames 303 are arranged on the conveyor belts 301, the two first conveyor frames 302 and the two second conveyor frames 303 are respectively fixedly installed on both sides of the protective box 1, a plurality of connecting plates 304 are fixedly installed between the two conveyor belts 301, a plurality of fixing bolts 305 distributed linearly are detachably installed on the connecting plates 304, and the bottom of the fixing bolts 305 extends below the connecting plate 304 and a hook 306 is fixedly installed.

[0022] A motor 307 is fixedly installed on one side of the protective box 1, a driving shaft 308 is fixedly installed on the output shaft of the motor 307, and the driving shaft 308 is rotatably connected with the protective box 1.

[0023] The first conveyor frame 302 includes a first bracket and a first pulley rotatably installed on the first bracket, the second conveyor frame 303 includes a second bracket and a second pulley rotatably installed on the second bracket, the driving shaft 308 penetrates through the two first pulleys on the same side of the protective box 1, and the conveyor belt 301 is sleeved on the outer sides of the corresponding first pulley and the second pulley.

[0024] The first disinfection mechanism 4 includes a disinfection box 401 which is used to contain disinfectant solution. A first fixing frame 402 is fixedly installed at the bottom of the disinfection box 401, and the bottom of the first fixing frame 402 is fixedly installed on the inner bottom wall of the protection box 1.

[0025] A plurality of ultrasonic generators 403 are provided on the inner bottom wall of the disinfection box 401.

[0026] Four third conveyor frames 404 are fixedly installed on the side wall of the disinfection box 401, and four fourth conveyor frames 405 are fixedly installed on the top of the disinfection box 401. The conveyor belt 301 is sleeved outside two corresponding third conveyor frames 404 and two corresponding fourth conveyor frames 405.

[0027] The drying mechanism 5 includes a drying box 501. A second fixing frame 502 is fixedly installed at the bottom of the drying box 501, and the bottom of the second fixing frame 502 is fixedly installed on the inner bottom wall of the protection box 1. The conveying and hanging mechanism 3 penetrates through the drying box 501. A partition plate 505 is fixedly installed in the drying box 501. A plurality of through holes 506 are formed in the top of the partition plate 505. A heating rod 507 fixedly installed on the inner wall of the drying box 501 is arranged below the partition plate 505.

[0028] A flue gas collection hood 503 is arranged at the top of the drying box 501. One end of an air extraction pipe 504 is connected to the top of the flue gas collection hood 503, and the air extraction pipe 504 is connected to a negative pressure device.

[0029] The second disinfection mechanism 6 includes an ultraviolet lamp installation box 601. A third fixing frame 602 is fixedly installed at the bottom of the ultraviolet lamp installation box 601, and the bottom of the third fixing frame 602 is fixedly installed on the inner bottom wall of the protection box 1. The conveying and hanging mechanism 3 penetrates through the ultraviolet lamp installation box 601. A plurality of first ultraviolet lamps 603 are fixedly installed on both the inner bottom and the top inner wall of the ultraviolet lamp installation box 601. A plurality of second ultraviolet lamps 604 are fixedly installed on the side wall of the ultraviolet lamp installation box 601, and the second ultraviolet lamps 604 are arranged obliquely.

[0030] The working principle of the automatic disinfection and drying equipment for medical orthopedic instruments provided by the present invention is as follows: During use, hang the orthopedic instruments to be processed on the hook 306. In this process, when processing orthopedic forceps or scissors, open the orthopedic forceps or scissors before hanging them, and then start the motor 307. The motor 307 drives the rotation of the driving shaft 308, and the driving shaft 308 drives the corresponding first pulley to rotate, thereby driving the conveyor belt 301 to rotate. The two conveyor belts 301 drive the connecting plate 304 to move, and the connecting plate 304 drives the fixing bolt 305 to move. The fixing bolt 305 drives the instrument to move from one side of the protective box 1 to the other side through the hook 306; When the instrument enters the protective box 1 and moves above the disinfection box 401, it is pressed into the disinfection water in the disinfection box 401 through a pair of third conveyor racks 404 and a pair of fourth conveyor racks 405, and the disinfection water completely covers the instrument. At the same time, start the ultrasonic generator 403 to vibrate the disinfectant, so as to disinfect the orthopedic instruments through the disinfectant. At the same time, the ultrasonic generator 403 can more quickly and conveniently wash the attachments on the orthopedic instruments off the orthopedic instruments; With the continuous start of the motor 307, the conveying and hanging mechanism 3 drives the orthopedic instruments to be removed from the disinfection water in the disinfection box 401 through another pair of third conveyor racks 404 and another pair of fourth conveyor racks 405, and is removed from the disinfection box 401 and enters the drying mechanism 5; When the orthopedic instrument enters the drying box 501, the heat in the drying box 501 is generated by the heating rod 507 and enters the upper part of the partition plate 505 through the through hole 506 on the partition plate 505, so as to quickly dry the orthopedic instrument stained with disinfection water. The waste gas generated during this process is discharged through the smoke collection hood 503 and the exhaust pipe 504; After the dried orthopedic instrument is removed from the drying box 501, it enters the ultraviolet lamp installation box 601. At this time, the dried orthopedic instrument can be comprehensively disinfected again through multiple first ultraviolet lamps 603 and multiple second ultraviolet lamps 604 arranged obliquely; Until the orthopedic instrument is removed from the other end of the protective box 1, at this time, the disinfection and air drying work of the entire orthopedic instrument is completed. At this time, just remove the orthopedic instrument from the hook 306.

[0031] Compared with the related technology, the automatic disinfection and drying equipment for medical orthopedic instruments provided by the present invention has the following beneficial effects: The present invention provides an automatic disinfection and drying device for medical orthopedic instruments. Through the setting of the protective box 1, when cleaning the instruments, the instruments can always be in a relatively enclosed environment, thus effectively avoiding secondary contamination of the instruments during disinfection and drying. Through the conveying and hanging mechanism 3 composed of a conveyor belt 301, a first conveyor frame 302, a second conveyor frame 303, a connecting plate 304, fixing bolts 305, hooks 306, a motor 307 and a driving shaft 308, the instruments can be hung and moved, and the instruments to be processed can be continuously passed through the first disinfection mechanism 4, the drying mechanism 5 and the second disinfection mechanism 6 in sequence, so as to continuously disinfect and dry different instruments, thereby effectively improving the efficiency of instrument processing. Through the first disinfection mechanism 4 composed of a disinfection box 401, a first fixing frame 402, an ultrasonic generator 403, a third conveyor frame 404 and a fourth conveyor frame 405, when the instruments hanging on the hooks 306 enter above the disinfection box, the instruments can be automatically moved into the disinfectant solution, thus ensuring the disinfection quality and efficiency of the disinfectant solution for the instruments. At the same time, cooperating with the ultrasonic generator 404 can better disinfect the instruments and can also peel off the attachments on the instruments from the instruments. Through the drying mechanism 5 composed of a drying box 501, a second fixing frame 502, a flue gas collection hood 503, an exhaust pipe 504, a partition plate 505, through holes 506 and heating rods 507, the instruments can be dried, and at the same time, the waste gas generated during drying can be treated. Through the second disinfection mechanism 6 composed of an ultraviolet lamp installation box 601, a third fixing frame 602, a first ultraviolet lamp 603 and a second ultraviolet lamp 604, the dried instruments can be further disinfected, thereby improving the disinfection quality of the whole device for orthopedic instruments and ensuring the cleanliness of the cleaned orthopedic instruments.

[0032] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An automatic disinfection and drying device for medical orthopedic instruments, characterized in that: include: A protection box, wherein a plurality of supporting feet distributed in a rectangular shape are fixedly installed on the bottom of the protection box, a conveying suspension mechanism is provided on the protection plate, and the conveying suspension mechanism runs through the protection box, and a first disinfection mechanism, a drying mechanism, and a second disinfection mechanism are provided in the protection plate, and the drying mechanism is located between the first disinfection mechanism and the second disinfection mechanism; The conveying and hanging mechanism is used to hang the instruments, and at the same time, the hung instruments are sequentially passed through the first disinfection mechanism, the drying mechanism and the second disinfection mechanism; The first disinfection mechanism disinfects the instrument by immersing it in a disinfectant; The drying mechanism is used to dry the device; The second disinfection mechanism uses ultraviolet irradiation to disinfect the instrument.

2. The automatic disinfection and drying device for medical orthopedic instruments according to claim 1, characterized in that: The conveying suspension mechanism includes two conveyor belts, on which two first conveyor racks and two second conveyor racks are provided, and the two first conveyor racks and the two second conveyor racks are respectively fixedly installed on both sides of the protective box, and a plurality of connecting plates are fixedly installed between the two conveyor belts, and a plurality of linearly distributed fixing bolts are detachably installed on the connecting plates, and the bottom of the fixing bolts extends to the bottom of the connecting press and is fixedly installed with a hook.

3. The automatic disinfection and drying device for medical orthopedic instruments according to claim 2, characterized in that: A motor is fixedly mounted on one side of the protection box, a driving shaft is fixedly mounted on the output shaft of the motor, and the driving shaft is rotatably connected to the protection box.

4. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 3, characterized in that: The first conveying frame includes a first bracket and a first pulley rotatably mounted on the first bracket, the second conveying frame includes a second bracket and a second pulley rotatably mounted on the second bracket, and the driving shaft passes through the two first pulleys located on the same side of the protective box.

5. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 4, characterized in that: The first disinfection mechanism comprises a disinfection box, which is used to contain disinfectant. A first fixing frame is fixedly mounted on the bottom of the disinfection box, and the bottom of the first fixing frame is fixedly mounted on the bottom inner wall of the protection box.

6. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 5, characterized in that: A plurality of ultrasonic generators are arranged on the inner wall of the bottom of the disinfection box.

7. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 1, characterized in that: Four third conveying racks are fixedly mounted on the side walls of the disinfection box, four fourth conveying racks are fixedly mounted on the top of the disinfection box, and the conveyor belt is sleeved on the outer sides of the corresponding two third conveying racks and two fourth conveying racks.

8. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 1, characterized in that: The drying mechanism includes a drying box, a second fixed frame is fixedly installed at the bottom of the drying box, the bottom of the second fixed frame is fixedly installed on the bottom inner wall of the protective box, the conveying suspension mechanism passes through the drying box, a partition is fixedly installed in the drying box, a plurality of through holes are opened on the top of the partition, and a heating rod fixedly installed on the inner wall of the drying box is provided below the partition.

9. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 8, characterized in that: A fume collecting hood is arranged on the top of the drying cabinet, and one end of an exhaust pipe is connected to the top of the fume collecting hood.

10. The automatic sterilizing and drying device for medical orthopedic instruments according to claim 1, characterized in that: The second disinfection mechanism includes an ultraviolet lamp installation box, a third fixing bracket is fixedly installed at the bottom of the ultraviolet lamp installation box, the bottom of the third fixing bracket is fixedly installed on the bottom inner wall of the protective box, the conveying suspension mechanism passes through the ultraviolet lamp installation box, a plurality of first ultraviolet lamps are fixedly installed on the bottom inner wall and the top inner wall of the ultraviolet lamp installation box, a plurality of second ultraviolet lamps are fixedly installed on the side wall of the ultraviolet lamp installation box, and the second ultraviolet lamps are arranged at an angle.

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