Smoke detection alarm

Abstract

The invention discloses a smoke detection alarm, and relates to the technical field of smoke detection alarms, the smoke detection alarm comprises a detection unit, the detection unit comprises a detection base and a first clamping groove formed in the detection base, the detection base is connected with a connecting seat assembly, and a fixing assembly is arranged in the connecting seat assembly; the connecting seat assembly is connected with a detection assembly; the air inlet unit comprises an air inlet shell and a labyrinth assembly arranged in the air inlet shell, the outer side of the air inlet shell is connected with an air inlet mounting assembly, and the air inlet shell is connected with a mounting clamping rod; the base unit comprises a bottom cover and a control structure arranged in the bottom cover, a mounting clamping ring is arranged on the outer side of the bottom cover, and a mounting clamping block is connected to the inner side of the mounting clamping ring; the problems that in the prior art, a single sensor is poor in stability in the long-term operation process, meanwhile, parts are not convenient to replace, and the complexity of inspection and maintenance is increased are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke alarms, and in particular to a smoke detection alarm. Background Art

[0002] A smoke detector alarm is a device used to monitor and warn of smoke generation in the early stages of a fire. They are widely used in residential, commercial buildings and industrial sites to provide early warnings, thereby protecting people's lives and reducing property losses. Traditional smoke detectors are mainly based on two detection technologies: photoelectric and ionization. Photoelectric smoke detectors work through a light source and a photoelectric sensor. Under normal conditions, light is directed from the light source to the sensor. When smoke particles enter the detector room, they scatter the light, changing the intensity of the light reaching the sensor and triggering an alarm. Ionization smoke detectors use ionized air produced by radioactive substances (such as ammonium yam). When smoke particles enter the detector, they reduce the flow of ions in the air and change the current, thereby activating the alarm.

[0003] However, regardless of whether the smoke detection alarm adopts photoelectric technology or ion technology, they are mostly equipped with a single detection sensor. This design has obvious defects. Once the sensor fails or is damaged, the entire detection system will lose its function and be unable to perform smoke detection tasks, thereby directly increasing safety risks. In addition, in terms of daily maintenance, the structure of a single sensor is not conducive to rapid diagnosis of problems and replacement of parts, which undoubtedly increases the complexity of inspection and maintenance, and creates additional challenges to maintaining the long-term stability of smoke detection alarms. Summary of the invention

[0004] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the fact that the single sensor in the above-mentioned prior art has poor stability during long-term operation and is inconvenient to replace components, which increases the complexity of inspection and maintenance, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a smoke detection alarm, comprising a detection unit, the detection unit comprising a detection base and a first clamping groove provided on the detection base, the detection base being connected to a connecting seat assembly, and a fixing assembly being arranged inside the connecting seat assembly, and the connecting seat assembly being connected to a detection assembly;

[0007] An air intake unit, the air intake unit comprising an air intake housing and a labyrinth assembly arranged inside the air intake housing, an air intake mounting assembly being connected to the outer side of the air intake housing, and a mounting clamping rod being connected to the air intake housing;

[0008] The base unit comprises a bottom cover and a control structure arranged inside the bottom cover, a mounting clamp ring is arranged on the outer side of the bottom cover, and a mounting block is connected to the inner side of the mounting clamp ring.

[0009] As a preferred solution of the smoke detection alarm of the present invention, the connecting seat assembly includes a connecting base and a second clamping groove provided on the connecting base, and the second clamping groove is arranged at equal angles with respect to the center line of the connecting base.

[0010] As a preferred solution of the smoke detection alarm described in the present invention, the fixed component includes a fixed adjustment knob and an intermediate transmission member connected to the fixed adjustment knob, and the other end of the intermediate transmission member is connected to a limiting member, and a clamping member is arranged on the outer side of the intermediate transmission member.

[0011] As a preferred solution of the smoke detection alarm of the present invention, the fixed adjustment knob is connected to the intermediate transmission member in a rotational manner, and the intermediate transmission member is connected in a limited sliding manner inside the limiting member.

[0012] As a preferred solution of the smoke detection alarm described in the present invention, the intermediate transmission member includes an intermediate connecting rod and a limiting slider connected to one end of the intermediate connecting rod, and the other end of the intermediate connecting rod is connected to a rotating connecting block, the outer side of the intermediate connecting rod is connected to a connecting chassis, and a wedge block is connected to the connecting chassis.

[0013] As a preferred solution of the smoke detection alarm described in the present invention, the clamping component includes a clamping block and a third clamping groove opened on the clamping block, a movable block is connected to the clamping block, and a reset spring is connected to one side of the movable block, and a wedge-shaped groove is opened inside the clamping block.

[0014] As a preferred solution of the smoke detection alarm of the present invention, the limiting member includes a limiting sleeve rod and a limiting sliding groove opened inside the limiting sleeve rod.

[0015] As a preferred solution of the smoke detection alarm of the present invention, the detection assembly includes a detection mounting rod and a mounting fixing ring connected to the outside of the detection mounting rod, and one end of the detection mounting rod is connected to a detection head.

[0016] As a preferred solution of the smoke detection alarm described in the present invention, the maze assembly includes a connecting shell and an air inlet opened on the connecting shell, the inner side of the connecting shell is connected to a mounting baffle, and a connecting channel is provided between the mounting baffles, and a detection cavity is provided on the inner side of the mounting baffle.

[0017] As a preferred solution of the smoke detection alarm described in the present invention, the air intake mounting assembly includes a mounting adjustment ring and a first transmission plate connected to the mounting adjustment ring, and one end of the first transmission plate is connected to an arc-shaped slider, one side of the first transmission plate is connected to a transmission gear, and the other side of the transmission gear is connected to a second transmission plate, and the second transmission plate is connected to a fixed clamping rod.

[0018] The beneficial effects of the present invention are as follows: through the setting of the detection unit, the setting of the second snap-in groove on the connecting seat assembly can be used to complete the installation of the detection assembly, and the detection assembly can be fixed by adjusting the fixing assembly to prevent the detection assembly from falling off. At the same time, since multiple detection assemblies are installed on the connecting seat assembly, when one of the detection assemblies is damaged, it will not affect the continued use of other detection assemblies, thereby ensuring that the alarm can continue to work normally. When the detection assembly needs to be replaced, the disassembly and installation of the detection assembly can be easily completed by rotating the fixing assembly, and the operation is simple and quick. Through the setting of the air intake unit, the air intake mounting assembly can be rotated to achieve rapid installation and fixation between the air intake housing and the detection base, thereby achieving efficient disassembly and assembly of the air intake unit and improving the efficiency of maintenance of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the detection unit in the present invention.

[0023] Figure 4 It is a schematic diagram of the connection structure between the connecting seat assembly and the detection assembly in the present invention.

[0024] Figure 5 It is a schematic diagram of the exploded structure of the fixing component in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the intermediate transmission member in the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the air intake installation assembly in the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the maze assembly in the present invention.

[0028] Fig. 9 for Figure 2 Enlarged structural diagram at A in the middle.

[0029] Fig.10 for Figure 2 Enlarged structural diagram at B in the middle.

[0030] In the figure: 10, detection unit; 11, detection base; 12, first clamping groove; 13, connecting seat assembly; 131, connecting base; 132, second clamping groove; 14, fixing assembly; 141, fixing adjustment knob; 142, intermediate transmission member; 1421, intermediate connecting rod; 1422, limit slider; 1423, rotating connection block; 1424, connecting chassis; 1425, wedge block; 143, clamping member; 1431, clamping block; 1432, third clamping groove; 1433, moving stopper; 1434, wedge groove; 1435, reset spring; 144, limiting member; 1441, limiting sleeve rod; 1442, limiting Slide groove; 15, detection component; 151, detection installation rod; 152, installation fixing ring; 153, detection head; 20, air intake unit; 21, air intake shell; 22, labyrinth component; 221, connecting shell; 222, air inlet; 223, installation baffle; 224, connecting channel; 225, detection chamber; 23, air intake installation component; 231, installation adjustment ring; 232, first transmission plate; 233, arc-shaped slider; 234, transmission gear; 235, second transmission plate; 236, fixing clamp rod; 24, installation clamp rod; 30, base unit; 31, bottom cover; 32, control structure; 33, installation clamp ring; 34, installation block. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Example 1

[0034] Reference Figure 1 to Figure 6 , which is the first embodiment of the present invention, provides a smoke detection alarm, including a detection unit 10 and a base unit 30, the detection unit 10 includes a detection base 11 and a first clamping groove 12 opened on the detection base 11, a connecting base component 13 is connected to the detection base 11, and a fixing component 14 is arranged inside the connecting base component 13, and a detection component 15 is connected to the connecting base component 13, wherein the first clamping groove 12 is opened at multiple locations at equal angles on the detection base 11 to ensure the stability of the installation connection, and at the same time, a fixing groove is arranged inside the first clamping groove 12, which is used to limit and fix the air intake unit 20 when installing, the connecting base component 13 is fixedly connected to the lower side of the detection base 11, and the detection component 15 is installed on the connecting base component 13; multiple detection components 15 are installed on the connecting base component 13, and the fixing component 14 is used to fix the installation of the detection component 15, so as to facilitate the installation and removal of the detection component 15.

[0035] The base unit 30 includes a bottom cover 31 and a control structure 32 arranged inside the bottom cover 31, a mounting snap ring 33 is arranged on the outer side of the bottom cover 31, and a mounting block 34 is connected to the inner side of the mounting snap ring 33, wherein the bottom cover 31 is mounted on the detection base 11 by bolts, and the control structure 32 is arranged between the detection unit 10 and the base unit 30, and the control structure 32 can be inspected and debugged by disassembling the bottom cover 31; the mounting snap ring 33 is fixedly connected to the upper side of the detection base 11, and the mounting block 34 is used to complete the connection and fixation between the alarm and the mounting base.

[0036] The connecting seat assembly 13 includes a connecting base 131 and a second clamping groove 132 provided on the connecting base 131, and the second clamping groove 132 is arranged at equal angles with respect to the center line of the connecting base 131, so that multiple detection assemblies 15 can be installed at the same time to ensure the long-term stable operation of the alarm; the fixing assembly 14 includes a fixed adjustment knob 141 and an intermediate transmission member 142 connected to the fixed adjustment knob 141, and the other end of the intermediate transmission member 142 is connected to a limiting member 144, and a clamping member 143 is arranged on the outer side of the intermediate transmission member 142, wherein the fixed adjustment knob 141 A threaded connection structure is provided on the upper side for threaded connection with the connecting base 131, and a connecting groove is opened thereon for connecting with the intermediate transmission member 142, so that the fixed adjustment knob 141 can drive the intermediate transmission member 142 to move up and down, and through the matching connection between the intermediate transmission member 142 and the limiting member 144, when the fixed adjustment knob 141 drives the intermediate transmission member 142 to move up and down, the intermediate transmission member 142 will not rotate synchronously with the fixed adjustment knob 141, thereby ensuring that the intermediate transmission member 142 can be matched and connected with the clamping member 143.

[0037] The intermediate transmission member 142 includes an intermediate connecting rod 1421 and a limiting slider 1422 connected to one end of the intermediate connecting rod 1421, and the other end of the intermediate connecting rod 1421 is connected to a rotating connecting block 1423, the outer side of the intermediate connecting rod 1421 is connected to a connecting chassis 1424, and the connecting chassis 1424 is connected to a wedge block 1425, wherein the limiting slider 1422 is fixedly connected to the outer side of one end of the intermediate connecting rod 1421, and is used to cooperate with the limiting member 144 to ensure that the intermediate connecting rod 1421 can only move up and down without In the current rotation situation, the rotating connecting block 1423 is connected to the other end of the middle connecting rod 1421, and its cross-sectional shape is an isosceles trapezoid, and the rotating connecting block 1423 is rotatably connected to the fixed adjusting knob 141; the connecting chassis 1424 is fixedly connected to the middle connecting rod 1421, and the wedge block 1425 is fixedly connected to the connecting chassis 1424, and the wedge blocks 1425 are arranged at equal angles on the connecting chassis 1424, and at the same time, an inclined surface is provided on the upper side surface close to the outside of the wedge block 1425 to cooperate with the clamping piece 143.

[0038] The clamping member 143 includes a clamping block 1431 and a third clamping groove 1432 provided on the clamping block 1431, a movable stopper 1433 is connected to the clamping block 1431, and a return spring 1435 is connected to one side of the movable stopper 1433, a wedge-shaped groove 1434 is provided inside the clamping block 1431, wherein the third clamping groove 1432 is provided at an outer position on the clamping block 1431, and an inclined surface is provided at a position below the third clamping groove 1432 on the clamping block 1431, a crossbar structure is connected to the other side of the clamping block 1431, and a wedge-shaped groove 1434 is provided at one end of the crossbar structure, and the wedge-shaped groove 1434 can be matched and connected with the wedge block 1425, so that the wedge block 1431 425 can limit the movement of the clamping block 1431; the movable block 1433 is fixedly connected to the upper and lower sides of the clamping block 1431, and a reset spring 1435 is fixedly connected to one side of the movable block 1433, which is used to reset the clamping block 1431; the limiting member 144 includes a limiting sleeve rod 1441 and a limiting slide groove 1442 opened inside the limiting sleeve rod 1441, wherein the limiting sleeve rod 1441 is fixedly connected to the inside of the connecting base 131, and a connecting groove is opened at the lower end of the limiting sleeve rod 1441, and the limiting slide groove 1442 is opened inside the connecting groove, and is slidably connected with the limiting slider 1422 to limit the movement of the intermediate connecting rod 1421.

[0039] The detection component 15 includes a detection mounting rod 151 and a mounting fixing ring 152 connected to the outside of the detection mounting rod 151, and one end of the detection mounting rod 151 is connected to a detection head 153, wherein the detection mounting rod 151 is installed inside the second clamping groove 132, and the mounting fixing ring 152 is used to cooperate with the third clamping groove 1432, and at the same time, the same inclined surface structure is provided on the upper and lower sides of the outside of the mounting fixing ring 152, which is convenient for the mounting fixing ring 152 to cooperate with the third clamping groove 1432, and can also cooperate with the inclined surface provided on the lower side of the clamping block 1431, so as to facilitate the installation and fixation of the detection component 15.

[0040] Example 2

[0041] Reference Figure 2 and Figure 7 to Figure 10, which is the second embodiment of the present invention. Based on the embodiment 1, this embodiment is further improved in that: the air intake unit 20, the air intake unit 20 includes an air intake shell 21 and a labyrinth assembly 22 arranged inside the air intake shell 21, the outer side of the air intake shell 21 is connected with an air intake mounting assembly 23, and the air intake shell 21 is connected with a mounting clamping rod 24, wherein the labyrinth assembly 22 is fixedly arranged inside the air intake shell 21, and the air intake shell 21 and the air intake mounting assembly 23 are connected in a threaded manner, so that the air intake mounting assembly 23 can move up and down on the air intake shell 21, and the mounting clamping rod 24 is fixedly connected to the upper side of the air intake shell 21, and the mounting clamping rod 24 corresponds to the first clamping groove 12, so that the mounting clamping rod 24 can be inserted into the first clamping groove 12 to complete the installation connection between the detection unit 10 and the air intake unit 20.

[0042] The maze assembly 22 includes a connecting shell 221 and an air inlet 222 opened on the connecting shell 221, the inner side of the connecting shell 221 is connected to a mounting baffle 223, and a connecting channel 224 is arranged between the mounting baffles 223, and a detection cavity 225 is arranged on the inner side of the mounting baffles 223, wherein the air inlet 222 is opened on the connecting shell 221, and a filter structure is arranged in the air inlet 222, and at the same time, the air inlet 222 and the detection cavity 225 are connected by the connecting channel 224, so that smoke can enter the detection cavity 225 through the air inlet 222 and the connecting channel 224, and the connecting channel 224 is separated by the mounting baffle 223.

[0043] The air intake mounting assembly 23 includes a mounting adjustment ring 231 and a first transmission plate 232 connected to the mounting adjustment ring 231, and one end of the first transmission plate 232 is connected to an arc-shaped slider 233, one side of the first transmission plate 232 is connected to a transmission gear 234, and the other side of the transmission gear 234 is connected to a second transmission plate 235, and the second transmission plate 235 is connected to a fixed clamping rod 236, wherein a circular groove with a cross-sectional shape of an isosceles trapezoid is provided on the mounting adjustment ring 231, and the cross-sectional shape of the arc-shaped slider 233 is also an isosceles trapezoid, and the arc-shaped slider 233 as a whole has the same curvature as the circular groove on the mounting adjustment ring 231, so that the arc-shaped slider 233 can move inside the circular groove on the mounting adjustment ring 231 The first transmission plate 232 and the transmission gear 234 as well as the transmission gear 234 and the second transmission plate 235 are connected in a meshing manner, so that the movement of the first transmission plate 232 can drive the second transmission plate 235 to move in the opposite direction; the fixed clamping rod 236 is rotatably connected to one side of the second transmission plate 235, and the second transmission plate 235 moves inside the mounting clamping rod 24. An opening for allowing the fixed clamping rod 236 to move is provided on one side of the mounting clamping rod 24 close to the detection base 11, and the upper and lower sides of the opening are designed with inclined surfaces of different inclinations to ensure that the fixed clamping rod 236 rotates appropriately when moving therein, thereby completing the mating connection between the fixed clamping rod 236 and the fixed clamping slot in the first clamping slot 12.

[0044] By setting the connecting seat assembly 13 and the fixing assembly 14 in the detection unit 10, the detection assembly 15 can be disassembled and fixed. First, turn the fixing adjustment knob 141 to drive the intermediate transmission member 142 to move downward, thereby disengaging the wedge block 1425 from the wedge groove 1434. At this time, the clamping block 1431 can move, and then the detection assembly 15 is inserted into the second clamping groove 132 to make the installation fixing ring 152 cooperate with the third clamping groove 1432. Then, turn the fixing adjustment knob 141 again to drive the intermediate transmission member 142 to move upward, so that the wedge block 1425 and the wedge groove 1434 cooperate with each other, complete the restriction of the clamping block 1431 and prevent it from moving, thereby completing the limit fixation of the detection assembly 15. When disassembly is required, just turn the fixing adjustment knob 141 to loosen the clamping block 1431 to complete the disassembly of the detection assembly 15.

[0045] When it is necessary to complete the installation between the detection unit 10 and the air intake unit 20, first, rotate the air intake mounting assembly 23 so that it is located at the lower side of the mounting position on the air intake housing 21, so that the fixing clamping rod 236 is retracted into the inside of the mounting clamping rod 24 under the action of the opening on the mounting clamping rod 24, and then the mounting clamping rod 24 is inserted into the inside of the first clamping groove 12, and then the installation adjustment ring 231 is rotated to drive the first transmission plate 232 to move upward, and the second transmission plate 235 is moved downward by the meshing transmission of the transmission gear 234, and then the fixing clamping rod 236 is extended and connected with the fixing clamping groove inside the first clamping groove 12 in coordination with the rotation of the fixing clamping rod 236 and the restriction of the opening on the mounting clamping rod 24, so as to complete the installation and fixation between the detection unit 10 and the air intake unit 20.

[0046] The remaining structures are the same as those of Example 1.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A smoke detection alarm, characterized in that: include, A detection unit (10), the detection unit (10) comprising a detection base (11) and a first clamping groove (12) provided on the detection base (11), the detection base (11) being connected to a connection base component (13), a fixing component (14) being arranged inside the connection base component (13), and a detection component (15) being connected to the connection base component (13); An air intake unit (20), the air intake unit (20) comprising an air intake housing (21) and a labyrinth assembly (22) arranged inside the air intake housing (21), an air intake mounting assembly (23) being connected to the outside of the air intake housing (21), and a mounting clamping rod (24) being connected to the air intake housing (21); A base unit (30) comprises a bottom cover (31) and a control structure (32) arranged inside the bottom cover (31); a mounting snap ring (33) is arranged on the outside of the bottom cover (31), and a mounting block (34) is connected to the inside of the mounting snap ring (33).

2. The smoke detector alarm according to claim 1, characterized in that: The connecting base assembly (13) comprises a connecting base (131) and a second clamping groove (132) provided on the connecting base (131), and the second clamping groove (132) is arranged to be distributed at equal angles with respect to the center line of the connecting base (131).

3. The smoke detector alarm according to claim 2, characterized in that: The fixing assembly (14) comprises a fixing adjustment knob (141) and an intermediate transmission member (142) connected to the fixing adjustment knob (141), and the other end of the intermediate transmission member (142) is connected to a limiting member (144), and a clamping member (143) is arranged on the outer side of the intermediate transmission member (142).

4. The smoke detector alarm according to claim 3, characterized in that: The fixed adjustment knob (141) and the intermediate transmission member (142) are connected in a rotational manner, and the intermediate transmission member (142) is connected in a limited sliding manner inside the limiting member (144).

5. The smoke detector alarm according to claim 4, characterized in that: The intermediate transmission member (142) comprises an intermediate connecting rod (1421) and a limiting slider (1422) connected to one end of the intermediate connecting rod (1421), and the other end of the intermediate connecting rod (1421) is connected to a rotating connecting block (1423), the outer side of the intermediate connecting rod (1421) is connected to a connecting chassis (1424), and the connecting chassis (1424) is connected to a wedge block (1425).

6. The smoke detector alarm according to claim 5, characterized in that: The clamping member (143) comprises a clamping block (1431) and a third clamping groove (1432) provided on the clamping block (1431); a movable stopper (1433) is connected to the clamping block (1431), and a return spring (1435) is connected to one side of the movable stopper (1433); a wedge-shaped groove (1434) is provided inside the clamping block (1431).

7. The smoke detector alarm according to claim 6, characterized in that: The limiting member (144) comprises a limiting sleeve rod (1441) and a limiting sliding groove (1442) opened inside the limiting sleeve rod (1441).

8. The smoke detector alarm according to claim 7, characterized in that: The detection assembly (15) comprises a detection installation rod (151) and a mounting fixing ring (152) connected to the outside of the detection installation rod (151); one end of the detection installation rod (151) is connected to a detection head (153).

9. The smoke detector alarm according to claim 8, characterized in that: The labyrinth assembly (22) comprises a connecting shell (221) and an air inlet (222) opened on the connecting shell (221); a mounting baffle (223) is connected to the inner side of the connecting shell (221); a connecting channel (224) is provided between the mounting baffles (223); and a detection cavity (225) is provided on the inner side of the mounting baffle (223).

10. The smoke detector alarm according to claim 9, characterized in that: The air intake mounting assembly (23) comprises an installation adjustment ring (231) and a first transmission plate (232) connected to the installation adjustment ring (231), wherein one end of the first transmission plate (232) is connected to an arc-shaped slider (233), one side of the first transmission plate (232) is connected to a transmission gear (234), and the other side of the transmission gear (234) is connected to a second transmission plate (235), and the second transmission plate (235) is connected to a fixed clamping rod (236).

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